cp's OEIS Frontend

A377062 Number of inequivalent n X 4 nonnegative integer arrays with row sums 4 and column sums n up to permutations of rows and columns.

%I A377062 #5 Oct 14 2024 20:30:00
%S A377062 1,1,3,9,43,147,661,2649,10738,40427,146206,498705,1625621,5049556,
%T A377062 15044485,43044068,118731621,316347549,816409799,2044571309,
%U A377062 4979112445,11810405775,27331117859,61792085482,136670650003,296071435108,628900592847,1311195696010,2685731232674,5409289235300,10721363532282
%N A377062 Number of inequivalent n X 4 nonnegative integer arrays with row sums 4 and column sums n up to permutations of rows and columns.
%e A377062 The a(2) = 3 matrices are:
%e A377062    [2 2 0 0]   [2 1 1 0]   [1 1 1 1]
%e A377062    [0 0 2 2]   [0 1 1 2]   [1 1 1 1]
%Y A377062 Column k=4 of A377060.
%Y A377062 Cf. A172816, A377061.
%K A377062 nonn
%O A377062 0,3
%A A377062 _Andrew Howroyd_, Oct 14 2024