Number of ways to reciprocally link elements of an 5 X n array either to themselves or to exactly two horizontal, diagonal and antidiagonal neighbors, without consecutive collinear links.
A220742
Number of ways to reciprocally link elements of an 5 X n array either to themselves or to exactly two horizontal, diagonal and antidiagonal neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =16a(2) =258a(3) =5760a(4) =127288a(5) =2792479a(6) =60293428a(7) =1311676964a(8) =28429050419a(9) =616803551956
External references
- oeis: A220742