Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2.
A217224
Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2.
Terms
- a(0) =0a(1) =38a(2) =1648a(3) =67956a(4) =2662621a(5) =102825095a(6) =3940138931a(7) =150405053021
External references
- oeis: A217224