A083518 revision #6
|
|
A083518
|
|
Beginning with 3, a(i)*a(j) + 2 is prime for all i,j, i<>j.
|
|
1
|
|
|
3, 5, 7, 27, 45, 495, 3615, 16695, 533445, 832305, 122789427, 8705408757, 77597861913
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
From 2nd term onwards, terms have the form 10k+5 or 10k+7. Conjecture: sequence is finite.
|
|
LINKS
|
|
|
EXAMPLE
|
3*7 +2, 5*7+2, 3*5+2, etc. are primes.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), May 05 2003
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|