Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the even squares of an n X n array with new integer colors introduced in row major order.
A215843
Number of horizontal, vertical, 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) =4a(3) =78a(4) =159712a(5) =1396243937
External references
- oeis: A215843