Number of ways to reciprocally link elements of an n X 6 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
A220706
Number of ways to reciprocally link elements of an n X 6 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =8a(2) =24a(3) =105a(4) =405a(5) =1617a(6) =6412a(7) =25449a(8) =101029a(9) =400986a(10) =1591697a(11) =6317904a(12) =25077948a(13) =99542634a(14) =395117919a(15) =1568354512a(16) =6225321052a(17) =24710371599a(18) =98083689723a(19) =389326813396
External references
- oeis: A220706