Number of nX3 0..1 arrays with every element unequal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318086

Number of nX3 0..1 arrays with every element unequal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =7a(4) =7a(5) =11a(6) =15a(7) =62a(8) =104a(9) =141a(10) =275a(11) =741a(12) =1325a(13) =2194a(14) =4346a(15) =9703a(16) =17959a(17) =32463a(18) =64123a(19) =132534a(20) =250208a(21) =470401a(22) =923631a(23) =1843613a(24) =3523413a(25) =6742322a(26) =13174390a(27) =25884507a(28) =49819771a(29) =96089259

External references