cp's OEIS Frontend

A077744 Smallest number whose cube ends in n, or 0 if no such number exists. a(n) = A077743(n)^(1/3).

%I A077744 #17 Apr 21 2025 04:06:59
%S A077744 1,8,7,4,5,6,3,2,9,0,71,8,17,0,0,6,73,0,39,0,41,0,47,24,5,0,3,12,9,0,
%T A077744 11,18,77,0,0,46,33,0,79,0,81,0,7,14,0,0,63,22,49,0,51,28,37,0,0,36,
%U A077744 93,0,19,0,21,0,67,4,0,0,23,32,89,0,91,38,97,0,15,26,53,0,59,0,61,0,27,44,0
%N A077744 Smallest number whose cube ends in n, or 0 if no such number exists. a(n) = A077743(n)^(1/3).
%H A077744 Robert Israel, <a href="/A077744/b077744.txt">Table of n, a(n) for n = 1..10000</a>
%F A077744 a(m*10^(3*k+1)) = a(m*10^(3*k+2)) = 0.
%e A077744 a(13) = 17, a(10) = 0.
%p A077744 f:= proc(n) local m,r,x;
%p A077744   m:= 10^(ilog10(n)+1);
%p A077744   r:= [msolve(x^3=n,m)];
%p A077744   if r = [] then 0 else min(map(t -> rhs(op(t)),r)) fi
%p A077744 end proc:
%p A077744 map(f, [$1..100]); # _Robert Israel_, Mar 05 2023
%Y A077744 Cf. A000578, A077743, A246449.
%K A077744 base,nonn
%O A077744 1,2
%A A077744 _Amarnath Murthy_, Nov 20 2002
%E A077744 More terms from _Sascha Kurz_, Jan 07 2003