Number of ways to reciprocally link elements of an n X n array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without consecutive collinear links.
A220675
Number of ways to reciprocally link elements of an n X n array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =4a(2) =43a(3) =2024a(4) =468036a(5) =455249977
External references
- oeis: A220675