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A291700
Number of ways of writing n as a sum of n nonnegative cubes.
7
1, 1, 1, 1, 1, 1, 1, 1, 9, 73, 361, 1321, 3961, 10297, 24025, 51481, 103081, 196521, 368425, 720937, 1589161, 4069801, 11511721, 33341353, 94142313, 253860201, 650564201, 1588228228, 3716917597, 8418378043, 18699454621, 41451042556, 93508305513, 218218347865, 530189399785
OFFSET
0,9
FORMULA
a(n) = [x^n] (Sum_{k>=0} x^(k^3))^n.
MATHEMATICA
Table[SeriesCoefficient[Sum[x^k^3, {k, 0, n}]^n, {x, 0, n}], {n, 0, 34}]
CROSSREFS
Main diagonal of A290054.
Sequence in context: A091986 A096129 A365304 * A143571 A244202 A079927
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Aug 30 2017
STATUS
approved