Number of nX4 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor.
A198902
Number of nX4 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor.
Terms
- a(0) =5a(1) =380a(2) =50384a(3) =6907736a(4) =948656912a(5) =130292546801
External references
- oeis: A198902