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 A256038 Triangle read by rows: number of R-class idempotent basis elements of rank k in Brauer monoid B_n. 0
 1, 0, 1, 0, 0, 1, 0, 2, 0, 1, 0, 0, 4, 0, 1, 0, 8, 0, 6, 0, 1, 0, 0, 24, 0, 8, 0, 1, 0, 48, 0, 48, 0, 10, 0, 1, 0, 0, 192, 0, 80, 0, 12, 0, 1, 0, 384, 0, 480, 0, 120, 0, 14, 0, 1, 0, 0, 1920, 0, 168, 0, 195, 0, 16, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,8 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, 2014. EXAMPLE Triangle begins: 1, 0, 1, 0, 0, 1, 0, 2, 0, 1, 0, 0, 4, 0, 1, 0, 8, 0, 6, 0, 1, 0, 0, 24, 0, 8, 0, 1, 0, 48, 0, 48, 0, 10, 0, 1, 0, 0, 192, 0, 80, 0, 12, 0, 1, 0, 384, 0, 480, 0, 120, 0, 14, 0, 1, 0, 0, 1920, 0, 168, 0, 195, 0, 16, 0, 1, ... CROSSREFS Sequence in context: A036852 A260941 A281442 * A050327 A075120 A111593 Adjacent sequences:  A256035 A256036 A256037 * A256039 A256040 A256041 KEYWORD nonn,tabl AUTHOR N. J. A. Sloane, Mar 14 2015 STATUS approved

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Last modified March 26 12:43 EDT 2019. Contains 321497 sequences. (Running on oeis4.)