A321458 Expansion of Product_{1 <= i <= j <= k} (1 - x^(i^2 + j^2 + k^2)).

1, 0, 0, -1, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 2, 0, 1, -1, -1, 2, 0, 0, 1, 0, 3, -3, -1, 1, -1, 4, -1, 1, 0, -5, 1, -1, 0, 0, -1, 5, -2, -7, -1, -1, 5, 0, 0, 2, -5, -2, -3, 1, 3, -3, 5, 1, -3, -8, -4, 16, 1, 4, -1, 2, 4, -17, 4, 5, 2, 10, -6, 10, -7, -23, 18, 3, 12

Offset: 0

Author

Seiichi Manyama, Nov 10 2018

Keywords

• sign

Crossrefs

Cf. A025427, A321432, A321436, A321457, A321459.

Formula

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