Search: a116215 -id:a116215
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A116168
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Numbers k such that k concatenated with k+1 gives the product of two numbers which differ by 8.
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+10
9
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19, 32, 16284704, 35576083, 15764836187996024260119639732979, 19807200907254352332962649366152, 20298517078413563250826300137112, 30190765850423053042937262322867, 30796637697589506772859224996627
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OFFSET
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1,1
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COMMENTS
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Also numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 6.
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LINKS
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EXAMPLE
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35576083//35576084 = 59645686 * 59645694, where // denotes concatenation.
35576083//35576091 = 59645687 * 59645693.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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A116169
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Numbers k such that k concatenated with k+1 gives the product of two numbers which differ by 9.
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+10
8
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OFFSET
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1,1
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COMMENTS
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Also numbers k such that k concatenated with k+9 gives the product of two numbers which differ by 7.
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LINKS
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EXAMPLE
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49//50 = 66 * 75, where // denotes concatenation.
49//58 = 67 * 74.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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A116209
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Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 7.
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+10
5
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1, 13, 41, 653, 2287, 2723, 5491, 23240971, 26823191, 60249661, 1841968537, 2009317771, 3044234903, 3258336353, 8166731261, 9481619237, 1281071245505271100098621541, 1551605670846640136726379653
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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A116346
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n times n+7 gives the concatenation of two numbers m and m+8.
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+10
5
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300, 421, 573, 694, 729, 9856, 36356, 63638, 970299, 4545456, 5454538, 88235296, 351069984, 403018036, 493927127, 506072867, 596981958, 648930010, 736842098, 739839101, 766233768, 769230762, 827751189, 857142859
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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A116216
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Numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 9.
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+10
4
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122, 424, 694, 778, 878, 11012, 17872, 33322, 44644, 100127651905364, 102071005406644, 107985753493528, 110694523108262, 115328750502614, 120698923758154, 126650002778762, 137336087431654, 147311014912628
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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44644//44652 = 66812 * 66821, where // denotes concatenation.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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