Binomial coefficients C(3n,n).
1, 3, 15, 84, 495, 3003, 18564, 116280, 735471, 4686825, 30045015, 193536720
5 seqfan posts
Fri Aug 6 03:25:10 CEST 2010 [seqfan] Re: A combinatorial problem: Sorry! Zak
Thu Aug 5 23:59:29 CEST 2010 [seqfan] Re: A combinatorial problem
Thu Aug 5 22:49:45 CEST 2010 [seqfan] Re: A combinatorial problem
Thu Aug 5 21:19:55 CEST 2010 [seqfan] Re: A combinatorial problem
Thu Aug 5 20:53:51 CEST 2010 [seqfan] Re: A combinatorial problem
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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