Number of n X 3 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically, diagonally or antidiagonally.

A228501

Number of n X 3 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically, diagonally or antidiagonally.

Terms

    a(0) =2a(1) =3a(2) =12a(3) =29a(4) =88a(5) =239a(6) =684a(7) =1909a(8) =5392a(9) =15143a(10) =42644a(11) =119933a(12) =337512a(13) =949535a(14) =2671740a(15) =7517061a(16) =21150272a(17) =59508247a(18) =167433188a(19) =471090573a(20) =1325464216a(21) =3729333775a(22) =10492879052a(23) =29522830997a(24) =83065631600a(25) =233713998087a(26) =657579228980

External references