Number of 2Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221810
Number of 2Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =1a(1) =10a(2) =34a(3) =214a(4) =1016a(5) =5429a(6) =27535a(7) =142858a(8) =733811a(9) =3785852a(10) =19494390a(11) =100466360a(12) =517573094a(13) =2666814576a(14) =13739888978a(15) =70792474153a(16) =364741397621
External references
- oeis: A221810