Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns.
A222090
Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns.
Terms
- a(0) =3a(1) =31a(2) =308a(3) =3034a(4) =29860a(5) =293848a(6) =2891636a(7) =28455036a(8) =280009384a(9) =2755404412a(10) =27114269752a(11) =266815111088
External references
- oeis: A222090