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 and columns in nonincreasing lexicographic order.
A331572
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 and columns in nonincreasing lexicographic order.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =1a(9) =1a(10) =1a(11) =4a(12) =7a(13) =3a(14) =1a(15) =1a(16) =8a(17) =59a(18) =45a(19) =3a(20) =1a(21) =1a(22) =16a(23) =701a(24) =1987a(25) =271a(26) =5a(27) =1a(28) =1a(29) =32
External references
- oeis: A331572