cp's OEIS Frontend

A211648 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2+x^2+y^2=3n.

%I A211648 #5 Dec 04 2016 19:46:28
%S A211648 0,1,3,3,1,0,3,6,3,4,6,6,3,0,6,6,1,6,12,6,0,0,12,12,3,7,6,12,6,0,12,6,
%T A211648 3,9,6,12,4,0,12,12,6,6,18,18,6,0,12,12,3,7,15,15,0,0,12,12,6,15,18,6,
%U A211648 6,0,18,24,1,12,15,18,6,0,12,12,12,12,18,15,6,0,24,18,0,13,18
%N A211648 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2+x^2+y^2=3n.
%C A211648 For a guide to related sequences, see A211422.
%t A211648 t = Compile[{{n, _Integer}}, Module[{s = 0},
%t A211648     (Do[If[w^2 + x^2 + y^2 == 3 n, s = s + 1],
%t A211648         {w, 1, #}, {x, 1, #}, {y, 1, #}] &[n]; s)]];
%t A211648 Map[t[#] &, Range[0, 100]]  (* A211648 *)
%t A211648 (* _Peter J. C. Moses_, Apr 13 2012 *)
%Y A211648 Cf. A211422.
%K A211648 nonn
%O A211648 0,3
%A A211648 _Clark Kimberling_, Apr 18 2012