A273438 Number of endofunctions on [n] with exactly seven cycles.

1, 84, 4830, 243390, 11717013, 560544138, 27196758875, 1353285904971, 69495472079033, 3696068344472504, 203958595104203576, 11687491140975605592, 695597351310503327386, 42988755956609918306640, 2757417607812192585058358, 183451189952939198906121968

Offset

7,2

Links

Alois P. Heinz, Table of n, a(n) for n = 7..386

Formula

E.g.f.: -1/7! * log(1+LambertW(-x))^7.

Crossrefs

Column k=7 of A060281.

Sequence in context: A075906 A075909 A132052 * A097840 A224177 A223869

Adjacent sequences: A273435 A273436 A273437 * A273439 A273440 A273441

Keyword

nonn

Author

Alois P. Heinz, May 22 2016

Status

approved