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 A243184 #14 Oct 16 2024 15:53:25
%S A243184 0,2,6,8,11,17,18,24,29,32,33,41,44,50,51,54,62,68,72,74,83,87,96,98,
%T A243184 99,101,107,116,123,128,131,132,134,149,150,153,162,164,167,173,176,
%U A243184 186,194,197,200,204,206,216,222,227,233,239,242,248,249,261,263,272,275,281,288,293,294,296,297
%N A243184 Nonnegative numbers of the form 2*x^2+3*x*y-3*y^2.
%C A243184 Discriminant 33.
%H A243184 R. J. Mathar, <a href="/A243184/b243184.txt">Table of n, a(n) for n = 1..1562</a>
%H A243184 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 A243184 Reap[For[n = 0, n <= 300, n++, If[Reduce[2*x^2 + 3*x*y - 3*y^2 == n, {x, y}, Integers] =!= False, Sow[n]]]][[2, 1]] (* In older versions, this program used to miss out 0 *)
%Y A243184 For primes see A141176. Cf. A243185.
%K A243184 nonn
%O A243184 1,2
%A A243184 _N. J. A. Sloane_, Jun 04 2014