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 A211483 #4 Apr 18 2012 17:06:12
%S A211483 1,5,10,16,22,30,38,46,55,65,75,85,95,107,119,131,143,155,168,182,196,
%T A211483 210,224,238,252,268,284,300,316,332,348,364,381,399,417,435,453,471,
%U A211483 489,507,525,545,565,585,605,625,645,665,685,705,726,748,770
%N A211483 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and (w+n)^2=x+y.
%C A211483 For a guide to related sequences, see A211422.
%t A211483 t[n_] := t[n] = Flatten[Table[(n + w)^2 - x - y, {w, -n, n}, {x, -n, n}, {y, -n, n}]]
%t A211483 c[n_] := Count[t[n], 0]
%t A211483 t = Table[c[n], {n, 0, 70}] (* A211483 *)
%Y A211483 Cf. A211422.
%K A211483 nonn
%O A211483 0,2
%A A211483 _Clark Kimberling_, Apr 12 2012