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 A155577 #4 Jul 14 2012 11:32:23
%S A155577 6,9,24,36,41,54,81,86,89,96,129,134,144,150,164,166,201,214,216,225,
%T A155577 241,246,249,281,294,321,324,326,344,356,369,384,401,409,441,449,454,
%U A155577 486,489,516,521,534,536,566,569,576,600,601,614,641,656,664,681,694
%N A155577 Intersection of A154777 and A154778: N = a^2 + 2b^2 = c^2 + 5d^2 for some positive integers a,b,c,d.
%C A155577 Subsequence of A155567 (where a,b,c,d may be zero).
%o A155577 (PARI) isA155577(n,/* optional 2nd arg allows us to get other sequences */c=[5,2]) = { for(i=1,#c, for(b=1,sqrtint((n-1)\c[i]), issquare(n-c[i]*b^2) & next(2)); return);1}
%o A155577 for( n=1,999, isA155577(n) & print1(n","))
%Y A155577 Cf. A000404, A154777, A092572, A097268, A154778, A155716, ...
%K A155577 easy,nonn
%O A155577 1,1
%A A155577 _M. F. Hasler_, Jan 25 2009