Number of nX4 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
A221479
Number of nX4 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.
Terms
- a(0) =1a(1) =73a(2) =1407a(3) =34751a(4) =865318a(5) =21576814a(6) =538159483a(7) =13422938865a(8) =334800425933
External references
- oeis: A221479