A320593 - OEIS

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A320593

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

2

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

(list; graph; refs; listen; history; text; internal format)

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