Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A317454

Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =10a(2) =36a(3) =72a(4) =353a(5) =1525a(6) =5601a(7) =20603a(8) =93180a(9) =376067a(10) =1440298a(11) =6219533a(12) =25449350a(13) =101546963a(14) =425583385a(15) =1746282597a(16) =7098263711a(17) =29371457881a(18) =120619016253a(19) =493714118241

External references