OFFSET
0,3
FORMULA
a(n) = [x^(n^3)] (Sum_{k>=0} x^(k^3))^n.
EXAMPLE
a(3) = 3 because we have [27, 0, 0], [0, 27, 0] and [0, 0, 27].
MATHEMATICA
Table[SeriesCoefficient[Sum[x^k^3, {k, 0, n}]^n, {x, 0, n^3}], {n, 0, 23}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Jan 24 2018
STATUS
approved