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A212087 Number of (w,x,y,z) with all terms in {1,...,n} and w^2+x^2=y^2+z^2.

%I A212087 #6 Dec 04 2016 19:46:29
%S A212087 0,1,6,15,28,45,66,95,132,173,210,267,320,385,458,523,600,693,786,899,
%T A212087 1000,1109,1226,1367,1492,1629,1778,1931,2084,2269,2426,2615,2812,
%U A212087 3013,3222,3427,3624,3857,4094,4335,4564,4841,5082,5379,5656,5913
%N A212087 Number of (w,x,y,z) with all terms in {1,...,n} and w^2+x^2=y^2+z^2.
%C A212087 For a guide to related sequences, see A211795.
%t A212087 t = Compile[{{n, _Integer}}, Module[{s = 0},
%t A212087 (Do[If[w^2 + x^2 == y^2 + z^2, s = s + 1],
%t A212087 {w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]];
%t A212087 Map[t[#] &, Range[0, 60]] (* A212087 *)
%t A212087 (* _Peter J. C. Moses_, Apr 13 2012 *)
%Y A212087 Cf. A211795.
%K A212087 nonn
%O A212087 0,3
%A A212087 _Clark Kimberling_, May 02 2012