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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
OFFSET
0,2
LINKS
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
Cf. A256031.
Sequence in context: A036432 A275621 A094431 * A209006 A168492 A346646
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Mar 14 2015
STATUS
approved