cp's OEIS Frontend

A211429 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and w^3 + x*y = 0.

%I A211429 #9 Nov 22 2016 02:38:47
%S A211429 1,9,13,17,29,33,37,41,57,69,73,77,81,85,89,93,105,109,121,125,129,
%T A211429 133,137,141,153,165,169,193,197,201,205,209,229,233,237,241,253,257,
%U A211429 261,265,277,281,285,289,293,297,301,305,317,329,341,345,349,353
%N A211429 Number of ordered triples (w,x,y) with all terms in {-n,...,0,...,n} and w^3 + x*y = 0.
%C A211429 For a guide to related sequences, see A211422.
%H A211429 Chai Wah Wu, <a href="/A211429/b211429.txt">Table of n, a(n) for n = 0..10000</a>
%t A211429 t[n_] := t[n] = Flatten[Table[w^3 + x*y, {w, -n, n}, {x, -n, n}, {y, -n, n}]]
%t A211429 c[n_] := Count[t[n], 0]
%t A211429 t = Table[c[n], {n, 0, 70}]  (* A211429 *)
%t A211429 (t - 1)/4                    (* integers *)
%Y A211429 Cf. A211422.
%K A211429 nonn
%O A211429 0,2
%A A211429 _Clark Kimberling_, Apr 10 2012