**Array T(m,n) read by antidiagonals: T(m,n) (m >= 1, n >= 1) = number of ways to arrange the numbers 1,2,..,m*n in an m X n matrix so that each row and each column is increasing.**

*1, 1, 1, 1, 2, 1, 1, 5, 5, 1, 1, 14, 42, 14, 1, 1, 42, 462, 462, 42, 1, 1, 132, 6006, 24024*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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