A321457 Expansion of Product_{1 <= i <= j <= k} (1 + x^(i^2 + j^2 + k^2)).

1, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 1, 2, 0, 2, 2, 0, 3, 3, 1, 4, 4, 2, 5, 4, 3, 7, 7, 5, 9, 10, 7, 11, 14, 9, 15, 19, 12, 22, 23, 17, 30, 29, 23, 41, 37, 32, 54, 46, 45, 68, 59, 63, 85, 79, 85, 107, 103, 108, 136, 136, 139, 174, 177, 178, 222, 225, 226, 287, 282, 290

Offset

0,10

Links

Table of n, a(n) for n=0..70.

Formula

G.f.: Product_{k>0} (1 + x^k)^A025427(k).

Crossrefs

Cf. A025427, A321429, A321435, A321458, A321459.

Sequence in context: A239002 A004548 A125921 * A029299 A309953 A281666

Adjacent sequences: A321454 A321455 A321456 * A321458 A321459 A321460

Keyword

nonn

Author

Seiichi Manyama, Nov 10 2018

Status

approved