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 A155574 #4 Jul 14 2012 11:32:23
%S A155574 12,19,36,43,48,57,67,73,76,97,108,129,139,144,147,163,171,172,192,
%T A155574 193,201,211,219,228,241,268,283,291,292,300,304,307,313,324,331,337,
%U A155574 361,379,387,388,409,417,432,433,441,457,475,484,489,499,507,513,516,523
%N A155574 Intersection of A154777 and A092572: N = a^2 + 2b^2 = c^2 + 3d^2 for some positive integers a,b,c,d.
%C A155574 Subsequence of A155564 (where a,b,c,d may be zero).
%o A155574 (PARI) isA155574(n,/* optional 2nd arg allows us to get other sequences */c=[3,2]) = { for(i=1,#c, for(b=1,sqrtint((n-1)\c[i]), issquare(n-c[i]*b^2) & next(2)); return);1}
%o A155574 for( n=1,999, isA155574(n) & print1(n","))
%Y A155574 Cf. A000404, A154777, A092572, A097268, A154778, A155716, A155717, A155560-A155578.
%K A155574 easy,nonn
%O A155574 1,1
%A A155574 _M. F. Hasler_, Jan 25 2009