1,2

a(n) = 0 if n is a cube (i.e., n is in A000578(k)).

a(n) = A181138(n) if n is not a cube. - Zak Seidov, Mar 26 2013

Alois P. Heinz, Table of n, a(n) for n = 1..10000

a(n) = ceiling(n^(2/3))^3 - n^2.

Cf. A068527, A181138.

Sequence in context: A264207 A264003 A077109 * A064220 A205105 A231957

Adjacent sequences: A070920 A070921 A070922 * A070924 A070925 A070926

easy,look,nonn

Benoit Cloitre, May 20 2002

approved