Number of n X 4 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor.
A198711
Number of n X 4 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) =5a(1) =172a(2) =6548a(3) =250031a(4) =9548295a(5) =364637102a(6) =13925032958a(7) =531779578441
External references
- oeis: A198711