Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.
A221797
Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =1a(1) =39a(2) =207a(3) =3074a(4) =26770a(5) =308070a(6) =3072428a(7) =33022374a(8) =341503872a(9) =3603418695a(10) =37628839684a(11) =395070947793
External references
- oeis: A221797