Number of stochastic matrices of integers: n X n arrays of nonnegative integers with all row and column sums equal to 3.
1, 1, 4, 55, 2008, 153040, 20933840, 4662857360, 1579060246400
2 seqfan posts
Mon Dec 14 08:28:00 CET 2009 [seqfan] Re: OEIS wiki user update