Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221931
Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =1a(1) =184a(2) =5748a(3) =201378a(4) =6888458a(5) =236114556a(6) =8089630790a(7) =277061308667
External references
- oeis: A221931