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Triangle read by rows: Number of ideals in Partial Brauer Monoid PB_n.
0

%I #11 Sep 27 2016 12:14:05

%S 1,1,2,4,8,9,16,41,50,51,81,225,306,322,323,441,1341,1966,2162,2187,

%T 2188,2601,8377,13138,15074,15474,15510,15511,16129,54545,90266,

%U 107955,112855,113584,113633,113634

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

%H I Dolinka, J East, RD Gray, <a href="http://arxiv.org/abs/1512.02279">Motzkin monoids and partial Brauer monoids</a>, arXiv preprint arXiv:1512.02279, 2015. See Table 2.

%e Triangle begins:

%e 1,

%e 1,2,

%e 4,8,9,

%e 16,41,50,51,

%e 81,225,306,322,323,

%e 441,1341,1966,2162,2187,2188,

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

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

%e ...

%K nonn,tabl

%O 0,3

%A _N. J. A. Sloane_, Sep 17 2016