Number of nonequivalent 3-column nonnegative integer matrices with column sums n and any number of nonzero rows up to permutation of rows and columns.
A331723
Number of nonequivalent 3-column nonnegative integer matrices with column sums n and any number of nonzero rows up to permutation of rows and columns.
Terms
- a(0) =1a(1) =3a(2) =23a(3) =162a(4) =1338a(5) =10585a(6) =82694a(7) =612700a(8) =4337251a(9) =29267424a(10) =189156449a(11) =1174258396a(12) =7027652401a(13) =40665520091a(14) =228144483468
External references
- oeis: A331723