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 A211512 #4 Apr 20 2012 15:10:09
%S A211512 0,0,0,2,2,2,6,6,6,8,8,8,14,14,14,16,18,18,22,22,22,24,24,24,30,32,32,
%T A211512 38,38,38,44,44,46,48,48,48,56,56,56,58,58,58,62,62,62,66,66,66,76,80,
%U A211512 82,84,84,84,92,92,92,94,94,94,104,104,104,108,112,112,116
%N A211512 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2=3x*y.
%C A211512 For a guide to related sequences, see A211422.
%t A211512 t[n_] := t[n] = Flatten[Table[w^2 - 3 x*y, {w, 1, n}, {x, 1, n}, {y, 1, n}]]
%t A211512 c[n_] := Count[t[n], 0]
%t A211512 t = Table[c[n], {n, 0, 70}] (* A211512 *)
%t A211512 t/2 (* integers *)
%Y A211512 Cf. A211422.
%K A211512 nonn
%O A211512 0,4
%A A211512 _Clark Kimberling_, Apr 14 2012