Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

A306168

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =21a(2) =30a(3) =93a(4) =249a(5) =544a(6) =1372a(7) =3411a(8) =8269a(9) =20472a(10) =50397a(11) =123803a(12) =305272a(13) =751590a(14) =1849735a(15) =4556239a(16) =11219928a(17) =27625541a(18) =68032151a(19) =167535478a(20) =412552316a(21) =1015939459a(22) =2501834023a(23) =6160893450a(24) =15171602577a(25) =37361209577a(26) =92004521524

External references