Number of 2 X n nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).
A208097
Number of 2 X n nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).
Terms
- a(0) =2a(1) =4a(2) =30a(3) =377a(4) =7239a(5) =193228a(6) =6752442a(7) =296290708a(8) =15835464207
External references
- oeis: A208097