Number of 2nX12 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors.
A198283
Number of 2nX12 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors.
Terms
- a(0) =16a(1) =700a(2) =31718a(3) =1478756a(4) =70004726a(5) =3337609528a(6) =158791292898
External references
- oeis: A198283