Number of nonnegative integer matrices with 3 columns and any number of distinct nonzero rows with column sums n and columns in nonincreasing lexicographic order.
A331712
Number of nonnegative integer matrices with 3 columns and any number of distinct nonzero rows with column sums n and columns in nonincreasing lexicographic order.
Terms
- a(0) =1a(1) =4a(2) =59a(3) =1987a(4) =73567a(5) =2451082a(6) =75511809a(7) =2339355873a(8) =69675164655
External references
- oeis: A331712