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Triangle read by rows: coefficients in expansion of number of r-colored set partitions of n as a polynomial in r.
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%I #8 Oct 20 2014 17:15:17

%S 1,1,1,1,3,1,1,5,7,1,1,6,19,15,1,1,10,22,67,31,1,1,12,56,67,229,63,1,

%T 1,-24,176,159,225,765,127,1

%N Triangle read by rows: coefficients in expansion of number of r-colored set partitions of n as a polynomial in r.

%H Eric Marberg, <a href="http://arxiv.org/abs/1203.5738">Crossings and nestings in colored set partitions</a>, arXiv preprint arXiv:1203.5738, 2012.

%e Triangle begins:

%e 1

%e 1 1

%e 1 3 1

%e 1 5 7 1

%e 1 6 19 15 1

%e 1 10 22 67 31 1

%e 1 12 56 67 229 63 1

%e 1 -24 176 159 225 765 127 1

%e ...

%K sign,tabl,more

%O 1,5

%A _N. J. A. Sloane_, Sep 22 2012