Number of n X n 0..3 arrays with rows nondecreasing and antidiagonals unimodal.
A224018
Number of n X n 0..3 arrays with rows nondecreasing and antidiagonals unimodal.
Terms
- a(0) =4a(1) =100a(2) =6796a(3) =772683a(4) =120352359a(5) =23151623729
External references
- oeis: A224018