Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2.
A221258
Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =0a(1) =64a(2) =112a(3) =58081a(4) =1319409a(5) =103489929a(6) =4085800416a(7) =226720727104
External references
- oeis: A221258