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 A165608 #6 Mar 31 2012 13:21:19
%S A165608 11,27,35,59,63,75,83,103,131,135,171,175,243,251,279,295,299,319,343,
%T A165608 351,363,371,375,395,415,419,495,539,563,567,575,607,635,659,675,703,
%U A165608 711,731,735,755,783,867,875,895,899,903,927,943,971,999,1063,1067
%N A165608 Numbers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) is never negative for any u in range [1,2n+1], but obtains at least one value zero, where J(i,m) is the Jacobi symbol.
%C A165608 Setwise difference of A095100 and A165469.
%Y A165608 a(n) = A004767(A165607(n)). Subset of A095100. A165977 gives the primes only. Cf. A165603.
%K A165608 nonn
%O A165608 1,1
%A A165608 _Antti Karttunen_, Oct 06 2009
%E A165608 Definition edited by _Jonathan Sondow_, Sep 27 2011