Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two.
A221394
Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with every occupancy equal to zero or two.
Terms
- a(0) =0a(1) =18a(2) =0a(3) =631a(4) =0a(5) =23188a(6) =0a(7) =852298a(8) =0a(9) =31322020a(10) =0a(11) =1151041183a(12) =0a(13) =42298797564a(14) =0a(16) =0a(18) =0a(20) =0a(22) =0a(24) =0a(26) =0a(28) =0
External references
- oeis: A221394