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Number of nonequivalent n-column nonnegative integer matrices with column sums 4 and any number of nonzero rows up to permutation of rows and columns.
1

%I #5 Feb 01 2020 13:39:43

%S 1,5,66,1338,43686,2142277,149056260,13991691663,1705750869937,

%T 262268740077763,49694977078927305,11388565848749818055,

%U 3107918736854019004136,996840601151518793573156,371595543159269706775806375,159437222426663041455988930042,78072200940916732097886063687252

%N Number of nonequivalent n-column nonnegative integer matrices with column sums 4 and any number of nonzero rows up to permutation of rows and columns.

%Y Row n=4 of A331485.

%K nonn

%O 0,2

%A _Andrew Howroyd_, Jan 31 2020