A320593 Number of partitions of n with five parts in which no part occurs more than twice.

1, 2, 3, 5, 8, 11, 16, 21, 28, 36, 46, 57, 71, 86, 104, 124, 148, 173, 203, 235, 272, 312, 357, 405, 460, 518, 583, 652, 729, 810, 900, 995, 1099, 1209, 1329, 1455, 1593, 1737, 1893, 2057, 2234, 2419, 2618, 2826, 3049, 3282, 3531, 3790, 4067, 4355, 4661, 4980

Offset

9,2

Links

Alois P. Heinz, Table of n, a(n) for n = 9..10000

Formula

G.f.: (x^5-x-1)*x^9/((x^2+x+1)*(x^4+x^3+x^2+x+1)*(x^2+1)*(x+1)^2*(x-1)^5).

Crossrefs

Column k=5 of A209318.

Sequence in context: A308823 A363047 A101018 * A006336 A175831 A070228

Adjacent sequences: A320590 A320591 A320592 * A320594 A320595 A320596

Keyword

nonn,easy

Author

Alois P. Heinz, Oct 16 2018

Status

approved