Number of 3 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.
A221611
Number of 3 X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.
Terms
- a(0) =0a(1) =4a(2) =54a(3) =811a(4) =11344a(5) =160999a(6) =2286878a(7) =32522604a(8) =462463456a(9) =6575844726a(10) =93499812718
External references
- oeis: A221611