This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A164701 #7 Mar 11 2014 01:32:46 %S A164701 2,4,2,6,5,2,4,6,10,2,12,6,2,11,16,14,2,18,12,4,2,10,5,22,2,4,17,12,2, %T A164701 10,6,18,28,2,30,6,25,2,16,23,4,2,36,5,18,21,2,4,40,2,34,42,29,10,2, %U A164701 13,22,30,46,19,2,6,11,4,2,12,5,52,2,4,36,6,2,45,28,12,58,34,2,60,41,30,2 %N A164701 a(n) = the smallest positive integer such that neither a(n) nor a(n)+1 are coprime to A024619(n), where A024619 is the sequence of positive integers that are not powers of primes. %C A164701 No two consecutive positive integers m and m+1 are both non-coprime to any particular power of a prime. %e A164701 22 is the 9th positive integer that is not a power of a prime. a(9) = 10 because neither 10 nor 10+1=11 is coprime to 22, and 10 and 11 are the smallest pair of consecutive positive integers where this is the case. %Y A164701 Cf. A024619. %K A164701 nonn %O A164701 1,1 %A A164701 _Leroy Quet_, Aug 22 2009 %E A164701 Extended by _Ray Chandler_, Mar 15 2010