Number of 4Xn arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
A221696
Number of 4Xn arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
Terms
- a(0) =1a(1) =987a(2) =63676a(3) =7033429a(4) =659020617a(5) =64509677154
External references
- oeis: A221696