Number of 2Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns.
A221552
Number of 2Xn arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out left turns.
Terms
- a(0) =1a(1) =10a(2) =72a(3) =503a(4) =3517a(5) =24546a(6) =171268a(7) =1194876a(8) =8335964a(9) =58154668a(10) =405706565a(11) =2830343128a(12) =19745403738a(13) =137750412592a(14) =960992030353
External references
- oeis: A221552