A321444 Expansion of Product_{0 < i < j} (1 - x^(i^2 + j^2)).

1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, -1, 0, 1, 0, -1, 1, 0, -1, 0, 1, 1, 0, 0, -1, 1, -1, -1, 3, 1, -1, 1, 0, -1, 1, 0, 0, 3, -3, -2, 2, -1, -1, 2, 3, -1, -1, -1, 0, 1, -4, 0, 4, 0, -6, 4, 1, -6, 3, 1, 0, 2, -4, -2, 6, -4, -5, 9, -1, -5, 2, -1, -2, 0, -3, 2, 11

Offset: 0

Author

Seiichi Manyama, Nov 09 2018

Keywords

• sign

Crossrefs

Cf. A025441, A319734, A321436.

Formula

G.f.: Product_{k>0} (1 - x^k)^A025441(k).