Array read by antidiagonals: A(n,k) is the number of nonnegative integer matrices with k columns and any number of distinct nonzero rows with column sums n.

A331568

Array read by antidiagonals: A(n,k) is the number of nonnegative integer matrices with k columns and any number of distinct nonzero rows with column sums n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =1a(9) =1a(10) =1a(11) =13a(12) =13a(13) =3a(14) =1a(15) =1a(16) =75a(17) =313a(18) =87a(19) =3a(20) =1a(21) =1a(22) =541a(23) =14797a(24) =11655a(25) =539a(26) =5a(27) =1a(28) =1a(29) =4683

External references