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 A155713 #4 Jul 14 2012 11:32:23
%S A155713 49,70,105,145,150,166,196,214,225,241,249,280,294,321,406,409,420,
%T A155713 441,454,505,580,600,601,609,630,664,681,694,721,726,745,769,784,841,
%U A155713 856,870,886,889,900,934,945,964,996,1009,1030,1041,1089,1120,1126,1129
%N A155713 Intersection of A154778 and A155716: N = a^2 + 5b^2 = c^2 + 6d^2 for some positive integers a,b,c,d.
%o A155713 (PARI) isA155713(n,/* optional 2nd arg allows us to get other sequences */c=[6,5]) = { for(i=1,#c, for(b=1,sqrtint((n-1)\c[i]), issquare(n-c[i]*b^2) & next(2)); return);1}
%o A155713 for( n=1,999, isA155713(n) & print1(n","))
%Y A155713 Cf. A000404, A154777, A092572, A097268, A154778, A155716, A155717, A155560-A155578.
%K A155713 easy,nonn
%O A155713 1,1
%A A155713 _M. F. Hasler_, Jan 25 2009