Number of (n+4)X8 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s.

A183461

Number of (n+4)X8 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s.

Terms

    a(0) =3a(1) =19a(2) =69a(3) =199a(4) =1577a(5) =6125a(6) =20625a(7) =153353a(8) =622193a(9) =2445793a(10) =16246733a(11) =68704747a(12) =294587103a(13) =1786187735a(14) =7815231605a(15) =35323362355a(16) =200851434261a(17) =903548912739

External references