Number of nX3 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
A221134
Number of nX3 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
Terms
- a(0) =2a(1) =49a(2) =656a(3) =12544a(4) =200072a(5) =3485689a(6) =58132316a(7) =990486784a(8) =16699002692a(9) =282999528529
External references
- oeis: A221134