Revision History for A109942
(Underlined text is an addition;
strikethrough text is a deletion.)
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#7 by N. J. A. Sloane at Mon Jan 30 21:46:38 EST 2017
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#6 by Robert Israel at Mon Jan 30 19:06:19 EST 2017
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#5 by Robert Israel at Mon Jan 30 19:06:01 EST 2017
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| LINKS
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Robert Israel, <a href="/A109942/b109942.txt">Table of n, a(n) for n = 1..10000</a>
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| FORMULA
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a(n) >= n+1 unless n is in A002283, in which case a(n)=n-1. - Robert Israel, Jan 30 2017
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| MAPLE
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f:= proc(n) local k;
for k from 10^(1+ilog10(n))-1 by -1 do
if igcd(n, k) = 1 then return k fi
od
end proc:
map(f, [$1..100]); # Robert Israel, Jan 30 2017
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| STATUS
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approved
editing
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#4 by N. J. A. Sloane at Thu Dec 05 19:57:01 EST 2013
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| AUTHOR
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_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Jul 19 2005
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Discussion
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| Thu Dec 05
| 19:57
| OEIS Server: https://oeis.org/edit/global/2075
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#3 by Russ Cox at Sat Mar 31 13:20:57 EDT 2012
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| EXTENSIONS
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More terms from _David Wasserman (wasserma(AT)spawar.navy.mil), _, Jul 19 2005
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Discussion
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| Sat Mar 31
| 13:20
| OEIS Server: https://oeis.org/edit/global/880
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#2 by N. J. A. Sloane at Wed Sep 21 03:00:00 EDT 2005
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| DATA
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9, 9, 8, 9, 9, 7, 9, 9, 8, 99, 98, 97, 99, 99, 98, 99, 99, 97, 99, 99, 97, 97, 99, 97, 99, 99, 98, 99, 99, 97, 99, 99, 98, 99, 99, 97, 99, 99, 98, 99, 99, 97, 99, 97, 98, 99, 99, 97, 99, 99, 98, 99, 99, 97, 98, 99, 98, 99, 99, 97, 99, 99, 97, 99, 99, 97, 99, 99, 98, 99, 99, 97
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| KEYWORD
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base,easy,nonn,new
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| EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jul 19 2005
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#1 by N. J. A. Sloane at Tue Jul 19 03:00:00 EDT 2005
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| NAME
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Largest k-digit number coprime to n, where k is the number of digits in n.
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| DATA
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9, 9, 8, 9, 9, 7, 9, 9, 8, 99, 98, 97, 99, 99, 98, 99, 99, 97, 99, 99, 97, 97, 99, 97, 99, 97, 99, 99, 98, 99, 99, 97, 99, 97, 98, 99, 99, 97, 99, 99, 98, 99
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| OFFSET
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1,1
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| KEYWORD
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base,easy,nonn,new
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| AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 19 2005
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| STATUS
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approved
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