Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor.
A220997
Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor.
Terms
- a(0) =3a(1) =31a(2) =306a(3) =2989a(4) =29135a(5) =283872a(6) =2765627a(7) =26943707a(8) =262494146a(9) =2557299561a(10) =24914003827a(11) =242719929760
External references
- oeis: A220997