Number of 3 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).
A208098
Number of 3 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) =1a(1) =5a(2) =34a(3) =1573a(4) =169064a(5) =34438557a(6) =11535531783
External references
- oeis: A208098