Number of 3 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops or left turns.
A221788
Number of 3 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops or left turns.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =5a(4) =24a(5) =142a(6) =840a(7) =4919a(8) =28704a(9) =167344a(10) =975408a(11) =5685161a(12) =33135624a(13) =193128658a(14) =1125636408a(15) =6560689883a(16) =38238502992a(17) =222870328180
External references
- oeis: A221788