Number of n X 2 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).
A207864
Number of n X 2 nonnegative integer arrays with new values 0 upwards 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) =4a(2) =34a(3) =500a(4) =10900a(5) =322768a(6) =12297768a(7) =580849872a(8) =33093252880
External references
- oeis: A207864