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 A155576 #4 Jul 14 2012 11:32:23
%S A155576 10,25,40,58,73,90,97,100,106,145,160,193,202,225,232,241,250,265,292,
%T A155576 298,313,337,346,360,388,394,400,409,424,433,457,490,505,522,538,577,
%U A155576 580,586,601,625,634,640,657,673,730,745,769,772,778,808,810,841,865
%N A155576 Intersection of A000404 and A155716: N = a^2 + b^2 = c^2 + 6d^2 for some positive integers a,b,c,d.
%C A155576 Subsequence of A155566 (where a,b,c,d may be zero).
%o A155576 (PARI) isA155576(n,/* optional 2nd arg allows us to get other sequences */c=[6,1]) = { for(i=1,#c, for(b=1,sqrtint((n-1)\c[i]), issquare(n-c[i]*b^2) & next(2)); return);1}
%o A155576 for( n=1,999, isA155576(n) & print1(n","))
%Y A155576 Cf. A000404, A154777, A092572, A097268, A154778, A155716, ...
%K A155576 easy,nonn
%O A155576 1,1
%A A155576 _M. F. Hasler_, Jan 25 2009