A276773 - OEIS

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A276773

Triangle read by rows: Number of ideals in Partial Brauer Monoid PB_n.

1, 1, 2, 4, 8, 9, 16, 41, 50, 51, 81, 225, 306, 322, 323, 441, 1341, 1966, 2162, 2187, 2188, 2601, 8377, 13138, 15074, 15474, 15510, 15511, 16129, 54545, 90266, 107955, 112855, 113584, 113633, 113634

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..35.

I Dolinka, J East, RD Gray, Motzkin monoids and partial Brauer monoids, arXiv preprint arXiv:1512.02279, 2015. See Table 2.

EXAMPLE

Triangle begins:

1,2,

4,8,9,

16,41,50,51,

81,225,306,322,323,

441,1341,1966,2162,2187,2188,

2601,8377,13138,15074,15474,15510,15511,

16129,54545,90266,107955,112855,113584,113633,113634,

...

CROSSREFS

Sequence in context: A065391 A161792 A111261 * A294441 A246347 A255717

Adjacent sequences: A276770 A276771 A276772 * A276774 A276775 A276776

KEYWORD

nonn,tabl

AUTHOR

N. J. A. Sloane, Sep 17 2016

STATUS

approved