5300296

Appears in sequences

• Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation.at n=7A058194
• Array read by antidiagonals: A(n,k) is the number of nonequivalent nonnegative integer matrices with k columns and any number of nonzero rows with column sums n up to permutation of rows and columns.at n=58A331485