Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.
A221201
Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =0a(1) =9a(2) =10a(3) =196a(4) =720a(5) =6400a(6) =34272a(7) =242064a(8) =1460368a(9) =9610000a(10) =60194160a(11) =387459856a(12) =2455717680a(13) =15698085264a(14) =99863349040a(15) =636989149456
External references
- oeis: A221201