A039829 Number of different coefficient values in expansion of Product_{i=1..n} (1 + (-q)^i).

2, 2, 3, 4, 6, 10, 13, 17, 36, 48, 33, 39, 86, 100, 60, 68, 148, 166, 95, 105, 226, 248, 138, 150, 320, 346, 189, 203, 430, 460, 248, 264, 556, 590, 315, 333, 698, 736, 390, 410, 856, 898, 473, 495, 1030, 1076, 564, 588, 1220, 1270

Offset: 1

Author

Olivier Gérard

Keywords

• nonn

Crossrefs

Cf. A039822, A039828.

Programs

PARI

a(n) = #vecsort(Vec(prod(i = 1, n, (1 + (-q)^i))), , 8) \\ David A. Corneth, Aug 29 2018