Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 7 or 8 king-move adjacent elements, with upper left element zero.

A305582

Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =5a(2) =8a(3) =15a(4) =38a(5) =102a(6) =247a(7) =617a(8) =1559a(9) =3892a(10) =9739a(11) =24416a(12) =61132a(13) =153073a(14) =383397a(15) =960157a(16) =2404528a(17) =6021899a(18) =15081066a(19) =37768418a(20) =94586143a(21) =236878625a(22) =593231091a(23) =1485669328a(24) =3720663535a(25) =9317911688a(26) =23335483576a(27) =58440647945a(28) =146356910517

External references