cp's OEIS Frontend

A217735 a(n) = the least positive integer m such that n^3 + m^3 is a square, or 0, if (presumably) there is no such m.

%I A217735 #16 Mar 25 2013 13:12:16
%S A217735 2,1,0,8,0,0,21,4,18,65,37,0,0,70,0,32,0,9,0,0,7,26,1177,0,50,22,0,84,
%T A217735 0,0,0,16,88,450,665,72,11,1178,0,260,0,0,0,148,0,2,0,0,98,25,0,0,0,0,
%U A217735 0,65,112,0,0,0,0,0,189,128,10,0,0,0,0,14,0,36,0,0,0,0,0,273,0,0,162,0,0,28,0,602,0,33,0,585,65,4708,0,0,1121
%N A217735 a(n) = the least positive integer m such that n^3 + m^3 is a square, or 0, if (presumably) there is no such m.
%C A217735 All zero terms are suggestive(?). All positive terms are certain.
%H A217735 Giovanni Resta, <a href="/A217735/b217735.txt">Table of n, a(n) for n = 1..1000</a> (see comments in b-file)
%e A217735 n=1: 1^3+2^3=3^2
%e A217735 n=2: 2^3+1^3=3^2
%e A217735 n=4: 4^3+8^3=24^2
%e A217735 n=7: 7^3+21^3=98^2
%Y A217735 Cf. A103254 (values of n such that a(n) > 0).
%K A217735 nonn
%O A217735 1,1
%A A217735 _Zak Seidov_, Mar 22 2013