Number of horizontal and antidiagonal neighbor colorings of the even squares of a 4Xn array with new integer colors introduced in row major order.
A216340
Number of horizontal and antidiagonal neighbor colorings of the even squares of a 4Xn array with new integer colors introduced in row major order.
Terms
- a(0) =2a(1) =10a(2) =52a(3) =726a(4) =12840a(5) =373780a(6) =12297870a(7) =580853761a(8) =29562890980
External references
- oeis: A216340