cp's OEIS Frontend

A212097 Number of (w,x,y,z) with all terms in {1,...,n} and w^3

%I A212097 #9 Dec 04 2016 19:46:29
%S A212097 0,1,15,72,221,536,1098,2028,3445,5502,8368,12234,17304,23794,31963,
%T A212097 42089,54439,69332,87070,108013,132549,161043,193924,231550,274463,
%U A212097 323023,377776,439254,507882,584329,669046,762686,865804,979052
%N A212097 Number of (w,x,y,z) with all terms in {1,...,n} and w^3<x^3+y^3+z^3.
%C A212097 a(n)+A212100(n)=4^n.  For a guide to related sequences, see A211795.
%t A212097 t = Compile[{{n, _Integer}}, Module[{s = 0},
%t A212097 (Do[If[w^3 < x^3 + y^3 + z^3, s = s + 1],
%t A212097 {w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]];
%t A212097 Map[t[#] &, Range[0, 40]] (* A212097 *)
%t A212097 (* _Peter J. C. Moses_, Apr 13 2012 *)
%Y A212097 Cf. A211795.
%K A212097 nonn
%O A212097 0,3
%A A212097 _Clark Kimberling_, May 03 2012