This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A333884 #10 Apr 05 2021 18:46:25
%S A333884 1,7,6,5,4,3,2,1,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,37,
%T A333884 36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,
%U A333884 13,12,11,10,9,8,7,6,5,4,3,2,1,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45
%N A333884 Difference between smallest cube > n and n.
%C A333884 a(n) is the smallest positive number k such that n + k is a cube.
%H A333884 Michael De Vlieger, <a href="/A333884/b333884.txt">Table of n, a(n) for n = 0..9999</a>
%F A333884 a(n) = floor(n^(1/3) + 1)^3 - n.
%t A333884 Table[Floor[n^(1/3) + 1]^3 - n, {n, 0, 80}]
%Y A333884 Cf. A000578, A048763, A055400, A068527, A080883, A154840.
%K A333884 nonn
%O A333884 0,2
%A A333884 _Ilya Gutkovskiy_, Apr 08 2020