Number of nonnegative integer matrices with values summing to n, up to transposition and permutation of rows and columns.

A318395

Number of nonnegative integer matrices with values summing to n, up to transposition and permutation of rows and columns.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =7a(4) =21a(5) =54a(6) =167a(7) =491a(8) =1586a(9) =5132a(10) =17442a(11) =60399a(12) =216172a(13) =790436a(14) =2965333a(15) =11365813a(16) =44536775a(17) =178107679a(18) =726716229a(19) =3022464373a(20) =12807206008a(21) =55253891494a(22) =242585471236

External references