Number of 3 X n 0..3*n-1 arrays with upper left zero and lower right 3*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.
A265621
Number of 3 X n 0..3*n-1 arrays with upper left zero and lower right 3*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.
Terms
- a(0) =3a(1) =45a(2) =5625a(3) =392320a(4) =13534874a(5) =3413887598
External references
- oeis: A265621