Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221758
Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =0a(1) =8a(2) =1a(3) =241a(4) =748a(5) =16715a(6) =117067a(7) =1557684a(8) =14265803a(9) =161569614a(10) =1620282797a(11) =17408729025a(12) =179900894011
External references
- oeis: A221758