Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of an n X n array with new integer colors introduced in row major order.
A216456
Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of an n X n array with new integer colors introduced in row major order.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =203a(4) =580479a(5) =6423127757
External references
- oeis: A216456