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.

A331485

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.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =2a(9) =1a(10) =1a(11) =3a(12) =7a(13) =3a(14) =1a(15) =1a(16) =5a(17) =23a(18) =21a(19) =5a(20) =1a(21) =1a(22) =7a(23) =79a(24) =162a(25) =66a(26) =7a(27) =1a(28) =1a(29) =11

External references