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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

%I #4 Apr 04 2020 19:19:12

%S 1,1,7,31,264,1856,12703,71457,348622,1477513,5584477,19071063,

%T 59748789,173510124,471615249,1208756261,2940705168,6827326093,

%U 15197942364,32566376769,67408927586,135184087822,263356043520,499542801451,924501767285,1672391804486

%N 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.

%Y Row n=5 of A333733.

%K nonn

%O 0,3

%A _Andrew Howroyd_, Apr 04 2020