Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.

A221297

Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.

Terms

    a(0) =3a(1) =19a(2) =137a(3) =1001a(4) =7305a(5) =53291a(6) =388741a(7) =2835697a(8) =20685009a(9) =150886255a(10) =1100633309a(11) =8028513089a(12) =58563541437a(13) =427188362291

External references