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 A211508 #4 Apr 19 2012 17:39:20
%S A211508 0,0,1,2,2,4,4,6,5,6,8,8,8,12,8,10,12,12,11,16,12,16,16,12,16,20,14,
%T A211508 16,22,20,16,24,17,22,24,16,22,30,16,24,30,26,20,28,26,28,32,18,26,38,
%U A211508 21,30,36,28,28,34,30,36,34,26,34,46,20,28,46,36,32,40,30,42,40
%N A211508 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2=n-x*y.
%C A211508 For a guide to related sequences, see A211422.
%t A211508 t[n_] := t[n] = Flatten[Table[w^2 + x*y - n, {w, 1, n}, {x, 1, n}, {y, 1, n}]]
%t A211508 c[n_] := Count[t[n], 0]
%t A211508 t = Table[c[n], {n, 0, 80}] (* A211508 *)
%Y A211508 Cf. A211422.
%K A211508 nonn
%O A211508 0,4
%A A211508 _Clark Kimberling_, Apr 14 2012