Number of nX3 0..1 arrays with every element equal to 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

A298890

Number of nX3 0..1 arrays with every element equal to 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =3a(2) =1a(3) =4a(4) =4a(5) =11a(6) =26a(7) =66a(8) =171a(9) =462a(10) =1248a(11) =3419a(12) =9450a(13) =26334a(14) =73697a(15) =206960a(16) =582316a(17) =1640549a(18) =4625476a(19) =13047636a(20) =36816651a(21) =103906694a(22) =293290860a(23) =827923703a(24) =2337253142a(25) =6598367806a(26) =18628473233a(27) =52592572696a(28) =148482655256a(29) =419208157101

External references