Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

A304692

Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =16a(2) =56a(3) =178a(4) =669a(5) =2615a(6) =9573a(7) =35581a(8) =133149a(9) =495719a(10) =1845526a(11) =6880247a(12) =25634622a(13) =95503501a(14) =355868278a(15) =1325975629a(16) =4940513437a(17) =18408548266a(18) =68590644744a(19) =255569164599a(20) =952255335447

External references