Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.
A222015
Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns.
Terms
- a(0) =3a(1) =27a(2) =188a(3) =1363a(4) =9838a(5) =70994a(6) =512456a(7) =3698699a(8) =26696370a(9) =192687348a(10) =1390767557a(11) =10038200482a(12) =72453134112a(13) =522947981192
External references
- oeis: A222015