Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A300141

Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =4a(2) =1a(3) =18a(4) =41a(5) =130a(6) =510a(7) =1740a(8) =5554a(9) =20089a(10) =69607a(11) =233844a(12) =815086a(13) =2824883a(14) =9656170a(15) =33351986a(16) =115270625a(17) =396350451a(18) =1366335435a(19) =4714673357a(20) =16240450509a(21) =55971672188a(22) =193001422391a(23) =665159525391

External references