A290269 G.f.: Product_{m>0} (1 + x^m + 2*x^(2*m) + 3*x^(3*m)).

1, 1, 3, 5, 6, 10, 18, 25, 34, 53, 66, 94, 136, 179, 236, 325, 416, 550, 714, 913, 1181, 1530, 1917, 2446, 3091, 3862, 4828, 6051, 7457, 9233, 11465, 14028, 17181, 21099, 25651, 31251, 37948, 45853, 55380, 66833, 80236, 96271, 115496, 137822, 164470, 196094, 232837

Offset

0,3

Links

Seiichi Manyama, Table of n, a(n) for n = 0..500

Prog

(PARI) m = 30; Vec(prod(k=1, m, 1 + x^k + 2*x^(2*k) + 3*x^(3*k)) + O(x^m)) \\ Michel Marcus, Oct 07 2017

Crossrefs

Column k=3 of A290216.

Sequence in context: A027627 A194466 A270416 * A115059 A250218 A092835

Adjacent sequences: A290266 A290267 A290268 * A290270 A290271 A290272

Keyword

nonn

Author

Seiichi Manyama, Oct 06 2017

Status

approved