A256032 Number of idempotents in partial Brauer monoid PB_n.

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

Offset: 0

Author

N. J. A. Sloane, Mar 14 2015

Keywords

• nonn
• more

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.