Number of nX4 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.
A199643
Number of nX4 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.
Terms
- a(0) =2a(1) =60a(2) =1265a(3) =29229a(4) =658770a(5) =15066222a(6) =342328663a(7) =7797114144a(8) =177447181083
External references
- oeis: A199643