Number of n X n 0..3 arrays with rows and columns unimodal and antidiagonals nondecreasing.
A224044
Number of n X n 0..3 arrays with rows and columns unimodal and antidiagonals nondecreasing.
Terms
- a(0) =4a(1) =160a(2) =9731a(3) =638996a(4) =41991129a(5) =2701569493a(6) =169750613182
External references
- oeis: A224044