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

A304265

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

Terms

    a(0) =3a(1) =3a(2) =6a(3) =10a(4) =19a(5) =37a(6) =67a(7) =124a(8) =235a(9) =436a(10) =808a(11) =1513a(12) =2821a(13) =5245a(14) =9784a(15) =18247a(16) =33982a(17) =63334a(18) =118075a(19) =220021a(20) =410023a(21) =764248a(22) =1424311a(23) =2654380a(24) =4947124a(25) =9220057a(26) =17183197a(27) =32024569a(28) =59684740a(29) =111234331

External references