References to A006480

De Bruijn's S(3,n): (3n)!/(n!)^3.
1, 6, 90, 1680, 34650, 756756, 17153136, 399072960, 9465511770, 227873431500

1 seqfan posts

Sun Oct 31 02:14:49 CEST 2010    [seqfan] Triangle T(n, k) = C(n, k)^m (m-th Powers of Binomial Coefficients)
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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