Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
A201231
Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
Terms
- a(0) =3a(1) =24a(2) =140a(3) =1028a(4) =7791a(5) =66027a(6) =508368a(7) =4293464a(8) =33177954a(9) =282310785a(10) =2226471492a(11) =18845872240a(12) =149352193586
External references
- oeis: A201231