cp's OEIS Frontend

A211643 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2+x^2+y^2<=2n.

%I A211643 #6 Dec 04 2016 19:46:27
%S A211643 0,0,1,4,4,7,11,17,17,23,26,35,38,44,48,60,60,69,78,87,87,102,108,120,
%T A211643 121,133,139,157,163,169,178,196,196,214,220,238,241,256,266,284,284,
%U A211643 299,314,329,332,359,365,383,386,401,410,434,440,458,471,495
%N A211643 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2+x^2+y^2<=2n.
%C A211643 Is A211643 a subsequence of A211639?
%C A211643 For a guide to related sequences, see A211422.
%t A211643 t = Compile[{{n, _Integer}}, Module[{s = 0},
%t A211643     (Do[If[w^2 + x^2 + y^2 <= 2 n, s = s + 1],
%t A211643         {w, 1, #}, {x, 1, #}, {y, 1, #}] &[n]; s)]];
%t A211643 Map[t[#] &, Range[0, 80]]   (* A211643 *)
%t A211643 (* _Peter J. C. Moses_, Apr 13 2012 *)
%Y A211643 Cf. A211422.
%K A211643 nonn
%O A211643 0,4
%A A211643 _Clark Kimberling_, Apr 18 2012