Array read by antidiagonals: A(n,k) is the number of nonnegative integer matrices with k distinct columns and any number of distinct nonzero rows with column sums n and rows in decreasing lexicographic order.
A331160
Array read by antidiagonals: A(n,k) is the number of nonnegative integer matrices with k distinct columns and any number of distinct nonzero rows with column sums n and rows in decreasing lexicographic order.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =0a(4) =1a(5) =1a(6) =0a(7) =1a(8) =1a(9) =1a(10) =0a(11) =1a(12) =4a(13) =2a(14) =1a(15) =0a(16) =1a(17) =27a(18) =15a(19) =2a(20) =1a(21) =0a(22) =1a(23) =266a(24) =317a(25) =44a(26) =3a(27) =1a(28) =0a(29) =1
External references
- oeis: A331160