Number of nonnegative integer matrices with 2 distinct columns and any number of nonzero rows with column sums n and columns in decreasing lexicographic order.
A331396
Number of nonnegative integer matrices with 2 distinct columns and any number of nonzero rows with column sums n and columns in decreasing lexicographic order.
Terms
- a(0) =1a(1) =12a(2) =124a(3) =1280a(4) =13456a(5) =143808a(6) =1556416a(7) =17006592a(8) =187207936a(9) =2072947712a(10) =23063919616a(11) =257634271232
External references
- oeis: A331396