Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

A298456

Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =3a(2) =8a(3) =30a(4) =153a(5) =710a(6) =3490a(7) =17087a(8) =84008a(9) =413964a(10) =2040233a(11) =10061180a(12) =49619258a(13) =244733629a(14) =1207118898a(15) =5954066110a(16) =29368423541a(17) =144860206974a(18) =714526449382

External references