Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.
A221612
Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.
Terms
- a(0) =0a(1) =8a(2) =287a(3) =12270a(4) =472974a(5) =18561474a(6) =730077217a(7) =28767381806
External references
- oeis: A221612