cp's OEIS Frontend

A211644 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2+x^2+y^2>2n.

%I A211644 #5 Dec 04 2016 19:46:27
%S A211644 0,1,7,23,60,118,205,326,495,706,974,1296,1690,2153,2696,3315,4036,
%T A211644 4844,5754,6772,7913,9159,10540,12047,13703,15492,17437,19526,21789,
%U A211644 24220,26822,29595,32572,35723,39084,42637,46415,50397,54606,59035
%N A211644 Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2+x^2+y^2>2n.
%C A211644 For a guide to related sequences, see A211422.
%t A211644 t = Compile[{{n, _Integer}}, Module[{s = 0},
%t A211644     (Do[If[w^2 + x^2 + y^2 > 2 n, s = s + 1],
%t A211644         {w, 1, #}, {x, 1, #}, {y, 1, #}] &[n]; s)]];
%t A211644 Map[t[#] &, Range[0, 80]]     (* A211644 *)
%t A211644 (* _Peter J. C. Moses_, Apr 13 2012 *)
%Y A211644 Cf. A211422.
%K A211644 nonn
%O A211644 0,3
%A A211644 _Clark Kimberling_, Apr 18 2012