Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
A221358
Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
Terms
- a(0) =0a(1) =39a(2) =791a(3) =18738a(4) =410571a(5) =9021576a(6) =197291655a(7) =4313255090a(8) =94259266376
External references
- oeis: A221358