Number of 2nX8 0..2 arrays with values 0..2 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors.
A198281
Number of 2nX8 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) =4a(1) =52a(2) =662a(3) =8784a(4) =112750a(5) =1478756a(6) =19399132a(7) =254611868a(8) =3341562350a(9) =43867978456a(10) =575917076750
External references
- oeis: A198281