A357768 Number of n X n tables where rows represent distinct permutations of { 1, 2, ..., n } and the column sums are equal, up to permutations of rows and columns.

1, 1, 1, 9, 479, 2677443, 797253930582, 20411160794088064950

Offset

1,4

Links

Table of n, a(n) for n=1..8.

Crossrefs

Cf. A356722, A356723, A356724, A356725, A357766, A357767.

Sequence in context: A128947 A293951 A267236 * A306820 A157595 A042415

Adjacent sequences: A357765 A357766 A357767 * A357769 A357770 A357771

Keyword

hard,more,nonn

Author

Max Alekseyev, Oct 13 2022

Status

approved