Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
A221402
Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.
Terms
- a(0) =0a(1) =7a(2) =30a(3) =2110a(4) =26374a(5) =681300a(6) =11554698a(7) =239213277a(8) =4414861636a(9) =86099730502
External references
- oeis: A221402