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

A299684

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

Terms

    a(0) =3a(1) =4a(2) =15a(3) =54a(4) =156a(5) =854a(6) =3226a(7) =13013a(8) =56318a(9) =229915a(10) =948257a(11) =3968556a(12) =16399773a(13) =67970006a(14) =282408197a(15) =1170437914a(16) =4854200458a(17) =20140780494a(18) =83525093575a(19) =346439146067

External references