A321459 Expansion of Product_{1 <= i <= j <= k} 1/(1 - x^(i^2 + j^2 + k^2)).

1, 0, 0, 1, 0, 0, 2, 0, 0, 3, 0, 1, 5, 0, 2, 6, 0, 4, 10, 1, 6, 13, 3, 10, 19, 5, 15, 26, 10, 23, 37, 16, 32, 52, 26, 48, 74, 38, 70, 100, 59, 101, 138, 85, 144, 189, 126, 204, 256, 180, 284, 345, 262, 392, 468, 372, 537, 629, 522, 730, 847, 723, 992, 1134, 998, 1336

Offset

0,7

Links

Table of n, a(n) for n=0..65.

Formula

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

Crossrefs

Cf. A025427, A321433, A321437, A321457, A321458.

Sequence in context: A024159 A029302 A263415 * A143517 A145352 A086834

Adjacent sequences: A321456 A321457 A321458 * A321460 A321461 A321462

Keyword

nonn

Author

Seiichi Manyama, Nov 10 2018

Status

approved