Number of nX3 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317858

Number of nX3 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =6a(2) =4a(3) =19a(4) =32a(5) =72a(6) =164a(7) =331a(8) =790a(9) =1700a(10) =3879a(11) =8689a(12) =19763a(13) =44787a(14) =101708a(15) =232136a(16) =528496a(17) =1206975a(18) =2755982a(19) =6298876a(20) =14399412a(21) =32932776a(22) =75341117a(23) =172383450a(24) =394513860a(25) =902958422a(26) =2066919648a(27) =4731632878a(28) =10832452949a(29) =24800620478

External references