A362902 - OEIS

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A362902

Number of nonisomorphic multisets of fixed-point-free endofunctions on an n-set with n endofunctions.

1, 0, 1, 22, 81015, 78954264778, 28097782272713021650, 5303746708038163087962610366540, 750301169575330570948709311656320180808090293, 107340347538849305728376873042317973326061404804760169389400111, 20170881768834535901905153264317820972982675109510814553304001503205327205300015737

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

OFFSET

0,4

COMMENTS

Isomorphism is up to permutation of the elements of the n-set.

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..25

CROSSREFS

Main diagonal of A362899.

Cf. A277839.

Sequence in context: A078398 A280812 A060619 * A238635 A013770 A145323

Adjacent sequences: A362899 A362900 A362901 * A362903 A362904 A362905

KEYWORD

nonn

AUTHOR

Andrew Howroyd, May 10 2023

STATUS

approved