A321376 Expansion of Product_{1 < i <= j <= k} (1 - x^(i*j*k)).

1, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, -1, 0, 0, 0, 0, 0, -1, 0, 1, -1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 2, 0, 1, 1, 4, 0, 0, 0, 2, 0, -1, 1, 2, 0, 0, -1, 2, 1, -1, -1, -1, 0, -2, 0, -4, -1, 2, -2, -3, 0, -4, -4, -1, -1, -6, -2, -7, 0, 2, -2, -10

Offset: 0

Author

Seiichi Manyama, Nov 08 2018

Keywords

• sign
• look

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A122179, A321361, A321374, A321375, A321377.

Formula

G.f.: Product_{k>0} (1 - x^k)^A122179(k).