A256032 - OEIS

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A256032

Number of idempotents in partial Brauer monoid PB_n.

1

1, 2, 7, 38, 241, 1922, 17359, 180854, 2092801, 26851202, 376371799

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

I. Dolinka, J. East, A. Evangelou, D. FitzGerald, N. Ham, et al., Enumeration of idempotents in diagram semigroups and algebras, arXiv preprint arXiv:1408.2021 [math.GR], 2014. See Table 2 and Theorem 32 (iii).

CROSSREFS

Sequence in context: A036432 A275621 A094431 * A209006 A168492 A346646

Adjacent sequences: A256029 A256030 A256031 * A256033 A256034 A256035

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Mar 14 2015

STATUS

approved