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 A166059 #2 Mar 31 2012 13:21:20
%S A166059 91,175,575,631,731,1175,1591,2175,2575,3059,3199,3295,3575,4175,4575,
%T A166059 4695,5939,5959,6143,6575,7175,7259,7383,7575,7615,8175,9175,9199,
%U A166059 9491,9575,10135,10175,10407,10551,10607,10811,10955,11175,12575
%N A166059 Integers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) obtains value zero exactly 9 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol.
%C A166059 Fifth row of A166092.
%Y A166059 a(n) = A004767(A166058(n)).
%K A166059 nonn
%O A166059 1,1
%A A166059 _Antti Karttunen_, Oct 08 2009