Number of nX4 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.
A199651
Number of nX4 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) =14a(1) =953a(2) =59212a(3) =3695683a(4) =230693158a(5) =14399942873a(6) =898852775335
External references
- oeis: A199651