Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
A221374
Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =3a(1) =19a(2) =139a(3) =1035a(4) =7723a(5) =57643a(6) =430251a(7) =3211435a(8) =23970475a(9) =178918059a(10) =1335462571a(11) =9968028331a(12) =74402376363a(13) =555346897579
External references
- oeis: A221374