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

A304342

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

Terms

    a(0) =4a(1) =14a(2) =27a(3) =71a(4) =225a(5) =613a(6) =1752a(7) =5102a(8) =14673a(9) =42235a(10) =122016a(11) =352304a(12) =1016793a(13) =2936025a(14) =8478588a(15) =24482962a(16) =70700917a(17) =204172771a(18) =589619638a(19) =1702740928a(20) =4917307073a(21) =14200615673a(22) =41009800440a(23) =118431859204a(24) =342018606381a(25) =987713762163

External references