Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 5 or 8 king-move adjacent elements, with upper left element zero.
A305345
Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 5 or 8 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =13a(1) =105a(2) =126a(3) =454a(4) =1729a(5) =5408a(6) =17054a(7) =58109a(8) =187782a(9) =603230a(10) =1995190a(11) =6520429a(12) =21144350a(13) =69245859a(14) =226468041a(15) =737659360a(16) =2409323948a(17) =7873600196a(18) =25689526682a(19) =83865350045a(20) =273916886308a(21) =894189316717
External references
- oeis: A305345