Number of 2Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns.
A221781
Number of 2Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns.
Terms
- a(0) =1a(1) =25a(2) =258a(3) =2631a(4) =26861a(5) =273816a(6) =2792384a(7) =28476902a(8) =290412831a(9) =2961693438a(10) =30204010646a(11) =308027296692
External references
- oeis: A221781