Number of n X 4 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically or antidiagonally.
A228478
Number of n X 4 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically or antidiagonally.
Terms
- a(0) =3a(1) =9a(2) =41a(3) =172a(4) =728a(5) =3084a(6) =13050a(7) =55252a(8) =233875a(9) =990055a(10) =4191028a(11) =17741339a(12) =75101906a(13) =317918500a(14) =1345800258a(15) =5696989354a(16) =24116274286a(17) =102088075950a(18) =432155280235
External references
- oeis: A228478