Number of n X n 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302218
Number of n X n 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =3a(2) =43a(3) =934a(4) =40395a(5) =3420704a(6) =553097760a(7) =177191137344
External references
- oeis: A302218