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.

1, 1, 1, 10, 505, 2712342, 799413385118, 20420569739290737009

Offset

1,4

Links

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

Crossrefs

Cf. A356722, A356723, A356724, A357766, A357767, A357768.

Sequence in context: A095232 A042209 A272394 * A163703 A218720 A180476

Adjacent sequences: A356722 A356723 A356724 * A356726 A356727 A356728

Keyword

hard,more,nonn

Author

Max Alekseyev, Oct 11 2022

Status

approved