Number of n X n 0..4 arrays with values 0..4 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.
A198701
Number of n X n 0..4 arrays with values 0..4 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =0a(1) =3a(2) =185a(3) =322230a(4) =10239497407
External references
- oeis: A198701