Number of ways to reciprocally link elements of an n X n array either to themselves or to exactly two horizontal, diagonal and antidiagonal neighbors, without consecutive collinear links.

A220732

Number of ways to reciprocally link elements of an n X n array either to themselves or to exactly two horizontal, diagonal and antidiagonal neighbors, without consecutive collinear links.

Terms

    a(0) =1a(1) =2a(2) =22a(3) =712a(4) =127288a(5) =94226589a(6) =319803318494

External references