Number of n X 3 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor.
A198710
Number of n X 3 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor.
Terms
- a(0) =2a(1) =25a(2) =401a(3) =6548a(4) =107042a(5) =1749965a(6) =28609241a(7) =467717288a(8) =7646461682a(9) =125007943505
External references
- oeis: A198710