Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

A304539

Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =7a(2) =9a(3) =19a(4) =37a(5) =65a(6) =129a(7) =275a(8) =555a(9) =1143a(10) =2417a(11) =5101a(12) =10937a(13) =23873a(14) =52511a(15) =116647a(16) =261813a(17) =592025a(18) =1347981a(19) =3088537a(20) =7111583a(21) =16443119a(22) =38153839a(23) =88783305a(24) =207079559a(25) =483922933a(26) =1132625887a(27) =2654229335a(28) =6226282429a(29) =14617442181

External references