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A362651
Number of nonisomorphic multisets of involutions on an n-set with n involutions.
3
1, 1, 3, 7, 74, 1532, 478902, 1561933881, 74069769621942, 44786847731274624558, 454923769422460614413179958, 75365529411732671264995255795387368, 250450659464630320300793563353757730632329596, 16712244262184960007363857016489055045260380508520606142
OFFSET
0,3
COMMENTS
Isomorphism is up to permutation of the elements of the n-set.
LINKS
CROSSREFS
Main diagonal of A362648.
Sequence in context: A075611 A191485 A119572 * A172995 A325476 A234536
KEYWORD
nonn
AUTHOR
Andrew Howroyd, May 01 2023
STATUS
approved