Half the number of 4 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side.
A069449
Half the number of 4 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side.
Terms
- a(0) =7a(1) =269a(2) =5799a(3) =95783a(4) =1389619a(5) =18772467a(6) =243194821a(7) =3070812013
External references
- oeis: A069449