Number of horizontal, vertical or knight-move neighbor colorings of an nX3 array with new integer colors introduced in row major order.
A216661
Number of horizontal, vertical or knight-move neighbor colorings of an nX3 array with new integer colors introduced in row major order.
Terms
- a(0) =2a(1) =25a(2) =780a(3) =59799a(4) =8990804a(5) =2315439963a(6) =928319229295
External references
- oeis: A216661