Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
A221899
Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =3a(1) =31a(2) =258a(3) =2241a(4) =19408a(5) =167960a(6) =1453952a(7) =12585637a(8) =108943526a(9) =943035150a(10) =8163084148a(11) =70661144632a(12) =611655753520
External references
- oeis: A221899