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Number of n X n tables where each row represents a permutation of { 1, 2, ..., n } and the column sums are equal, with the first row being the identity permutation.
6

%I #5 Aug 25 2022 08:34:08

%S 1,1,2,105,58464,1938602560,4023598254840240,823167665449254453563025

%N Number of n X n tables where each row represents a permutation of { 1, 2, ..., n } and the column sums are equal, with the first row being the identity permutation.

%F a(n) = A356722(n) / n!.

%Y Cf. A356722, A356724, A356725.

%K nonn,more

%O 1,3

%A _Max Alekseyev_, Aug 25 2022