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 A155573 #4 Jul 14 2012 11:32:23
%S A155573 73,97,193,241,292,313,337,388,409,433,457,577,601,657,673,769,772,
%T A155573 873,900,937,964,1009,1033,1129,1153,1156,1168,1201,1249,1252,1297,
%U A155573 1321,1348,1489,1521,1552,1609,1636,1657,1732,1737,1753,1777,1801,1825,1828
%N A155573 Intersection of A000404, A154777 and A092572: N = a^2 + b^2 = c^2 + 2d^2 = e^2 + 3f^2 for some positive integers a,b,c,d,e,f.
%o A155573 (PARI) isA155573(n,/* optional 2nd arg allows us to get other sequences */c=[3,2,1]) = { for(i=1,#c, for(b=1,sqrtint((n-1)\c[i]), issquare(n-c[i]*b^2) & next(2)); return);1}
%o A155573 for( n=1,1999, isA155573(n) & print1(n","))
%Y A155573 Cf. A000404, A154777, A092572, A097268, A154778, A155716, A155717, A155560-A155578.
%K A155573 easy,nonn
%O A155573 1,1
%A A155573 _M. F. Hasler_, Jan 25 2009