Number of n X n 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.
A223955
Number of n X n 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.
Terms
- a(0) =4a(1) =85a(2) =3471a(3) =176893a(4) =9779558a(5) =556027700a(6) =31770135236
External references
- oeis: A223955