Number of n X n 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
A201444
Number of n X n 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
Terms
- a(0) =4a(1) =2a(2) =52a(3) =112a(4) =4544a(5) =16334a(6) =1129682a(7) =5464208a(8) =458459214a(9) =2605975384a(10) =253569083138
External references
- oeis: A201444