Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

A317031

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =14a(2) =30a(3) =82a(4) =280a(5) =842a(6) =2591a(7) =8141a(8) =25387a(9) =79075a(10) =247002a(11) =771516a(12) =2408705a(13) =7522325a(14) =23494122a(15) =73374104a(16) =229158274a(17) =715707738a(18) =2235297120a(19) =6981287296a(20) =21804026411a(21) =68098596051a(22) =212686440221a(23) =664265316611

External references