Number of nX4 0..3 arrays with rows unimodal and antidiagonals nondecreasing.
A224200
Number of nX4 0..3 arrays with rows unimodal and antidiagonals nondecreasing.
Terms
- a(0) =130a(1) =4580a(2) =108625a(3) =2411246a(4) =54177872a(5) =1229044416a(6) =27957232796a(7) =636184842092
External references
- oeis: A224200