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A356725
Number of n X n tables where each row represents a permutation of { 1, 2, ..., n } and the column sums are equal, up to permutation of rows and columns.
6
1, 1, 1, 10, 505, 2712342, 799413385118, 20420569739290737009
OFFSET
1,4
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Max Alekseyev, Oct 11 2022
STATUS
approved