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

A304266

Number of nX4 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) =5a(1) =5a(2) =10a(3) =21a(4) =50a(5) =116a(6) =259a(7) =601a(8) =1397a(9) =3196a(10) =7359a(11) =17016a(12) =39172a(13) =90185a(14) =208017a(15) =479413a(16) =1104402a(17) =2545521a(18) =5866934a(19) =13519272a(20) =31155923a(21) =71803941a(22) =165473389a(23) =381338852a(24) =878829251a(25) =2025313404a(26) =4667430712a(27) =10756397233a(28) =24788787493a(29) =57127147381

External references