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 A243173 #11 Sep 25 2014 23:36:31
%S A243173 0,1,4,9,15,16,19,24,25,31,36,40,49,51,60,61,64,69,76,79,81,85,96,100,
%T A243173 109,115,121,124,135,136,139,141,144,151,159,160,169,171,181,184,196,
%U A243173 199,204,211,216,225,229,235,240,241,244,249,256,265,271,276,279,285,289,304,316,321,324,331,339,340,349,360,361,375,376,379,384,391,400,409,411
%N A243173 Numbers of the form x^2+15y^2.
%C A243173 Discriminant -60.
%C A243173 Norms of numbers in Z[sqrt(-15)]. - _Alonso del Arte_, Sep 23 2014
%H A243173 Bruno Berselli, <a href="/A243173/b243173.txt">Table of n, a(n) for n = 1..1000</a>
%H A243173 N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)
%t A243173 nn = 22; Union[Select[Flatten[Table[x^2 + 15 y^2, {x, 0, nn}, {y, 0, nn}]], # <= nn^2 &]] (* _Bruno Berselli_, Jun 02 2014 *)
%Y A243173 Primes: A033212.
%K A243173 nonn
%O A243173 1,3
%A A243173 _N. J. A. Sloane_, Jun 01 2014