Number of ways to reciprocally link elements of an n X 7 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
A220707
Number of ways to reciprocally link elements of an n X 7 array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =13a(2) =48a(3) =298a(4) =1520a(5) =8338a(6) =44976a(7) =244029a(8) =1322551a(9) =7171769a(10) =38885648a(11) =210854845a(12) =1143330649a(13) =6199601829a(14) =33616711696a(15) =182283373322a(16) =988413912488
External references
- oeis: A220707