Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

A316423

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =21a(2) =32a(3) =97a(4) =279a(5) =640a(6) =1660a(7) =4353a(8) =10975a(9) =28038a(10) =72143a(11) =184345a(12) =471036a(13) =1206844a(14) =3088559a(15) =7899309a(16) =20219520a(17) =51748319a(18) =132403281a(19) =338838244a(20) =867145134a(21) =2218951631a(22) =5678392645a(23) =14531503004a(24) =37186210193a(25) =95160712029a(26) =243521427174

External references