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 A155566 #3 Jul 14 2012 11:32:23
%S A155566 0,1,4,9,10,16,25,36,40,49,58,64,73,81,90,97,100,106,121,144,145,160,
%T A155566 169,193,196,202,225,232,241,250,256,265,289,292,298,313,324,337,346,
%U A155566 360,361,388,394,400,409,424,433,441,457,484,490,505,522,529,538,576
%N A155566 Intersection of A001481 and A002481: N = a^2 + b^2 = c^2 + 6d^2 for some integers a,b,c,d.
%C A155566 Contains A155576 as a subsequence (obtained by restricting a,b,c,d to be nonzero). Also contains A000290 (squares) as subsequence.
%o A155566 (PARI) isA155566(n,/* use optional 2nd arg to get other analogous sequences */c=[6,1]) = { for(i=1,#c, for(b=0,sqrtint(n\c[i]), issquare(n-c[i]*b^2) & next(2)); return);1}
%o A155566 for( n=1,600, isA155566(n) & print1(n","))
%Y A155566 Cf. A001481, A002479, A003136, A002481, A020668 ff.
%K A155566 easy,nonn
%O A155566 1,3
%A A155566 _M. F. Hasler_, Jan 25 2009