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

A298496

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

Terms

    a(0) =3a(1) =3a(2) =1a(3) =4a(4) =5a(5) =6a(6) =20a(7) =35a(8) =70a(9) =174a(10) =365a(11) =789a(12) =1818a(13) =3997a(14) =8829a(15) =19887a(16) =44199a(17) =98280a(18) =219831a(19) =489860a(20) =1091470a(21) =2436279a(22) =5432314a(23) =12111558a(24) =27017683a(25) =60251823a(26) =134360364a(27) =299668975a(28) =668310211a(29) =1490410101

External references