Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.
A221737
Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns.
Terms
- a(0) =1a(1) =17a(2) =152a(3) =1347a(4) =11917a(5) =105408a(6) =932331a(7) =8246429a(8) =72939328a(9) =645145427a(10) =5706285509a(11) =50471867376a(12) =446421650827
External references
- oeis: A221737