A320332 Expansion of Product_{0 < i < j < k} (1 + x^(i^2 + j^2 + k^2)).

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 2, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 2, 2, 1, 1, 1, 1, 2, 4, 0, 0, 4, 1, 3, 3, 2, 4, 3, 2, 4, 3, 3, 6, 4, 2, 4, 4, 7, 7, 6, 4, 6, 8, 5, 6, 9, 7, 10, 8, 6, 12, 11

Offset

0,36

Links

Table of n, a(n) for n=0..89.

Formula

G.f.: Product_{k>0} (1 + x^k)^A025442(k).

Crossrefs

Cf. A025442, A319734, A321447, A321448.

Sequence in context: A330657 A307598 A324967 * A358007 A348956 A324868

Adjacent sequences: A320329 A320330 A320331 * A320333 A320334 A320335

Keyword

nonn

Author

Seiichi Manyama, Nov 09 2018

Status

approved