A333735 Number of non-isomorphic 5 X 5 nonnegative integer matrices with all row and column sums equal to n up to permutations of rows and columns.

1, 1, 7, 31, 264, 1856, 12703, 71457, 348622, 1477513, 5584477, 19071063, 59748789, 173510124, 471615249, 1208756261, 2940705168, 6827326093, 15197942364, 32566376769, 67408927586, 135184087822, 263356043520, 499542801451, 924501767285, 1672391804486

Offset

0,3

Links

Table of n, a(n) for n=0..25.

Crossrefs

Row n=5 of A333733.

Sequence in context: A261558 A241456 A094711 * A221875 A143564 A352411

Adjacent sequences: A333732 A333733 A333734 * A333736 A333737 A333738

Keyword

nonn

Author

Andrew Howroyd, Apr 04 2020

Status

approved