Number of 4 X n binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.
A228756
Number of 4 X n binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.
Terms
- a(0) =8a(1) =21a(2) =168a(3) =780a(4) =4599a(5) =24246a(6) =134440a(7) =728537a(8) =3988862a(9) =21739002a(10) =118720559a(11) =647758554a(12) =3535719686a(13) =19295840383a(14) =105313615878a(15) =574764393110
External references
- oeis: A228756