Number of n X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).
A207993
Number of n X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).
Terms
- a(0) =1a(1) =3a(2) =41a(3) =1302a(4) =96831a(5) =16932816a(6) =6978332618
External references
- oeis: A207993