Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

A316213

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =14a(2) =28a(3) =75a(4) =250a(5) =706a(6) =2116a(7) =6399a(8) =19179a(9) =57552a(10) =173123a(11) =520515a(12) =1564516a(13) =4704272a(14) =14144805a(15) =42529166a(16) =127877045a(17) =384503591a(18) =1156133200a(19) =3476296651a(20) =10452650138a(21) =31429406405a(22) =94503128515a(23) =284155666181a(24) =854410380210

External references