Number of n X n 0..3 arrays with rows unimodal and columns nondecreasing.
A223981
Number of n X n 0..3 arrays with rows unimodal and columns nondecreasing.
Terms
- a(0) =4a(1) =100a(2) =5029a(3) =358118a(4) =31831914a(5) =3322756326a(6) =392525216516
External references
- oeis: A223981