5717794568

Appears in sequences

• Number of ways to reciprocally link elements of an n X n array either to themselves or to exactly two horizontal, diagonal or antidiagonal neighbors.at n=5A220719
• Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal, diagonal or antidiagonal neighbors.at n=5A220723
• Number of ways to reciprocally link elements of an 6Xn array either to themselves or to exactly two horizontal, diagonal or antidiagonal neighbors.at n=5A220730