Number of n X n 0..2 arrays with values 0..2 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.
A199648
Number of n X n 0..2 arrays with values 0..2 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =14a(2) =2584a(3) =3695683a(4) =39209840355
External references
- oeis: A199648