42378036

Appears in sequences

• Number of ways to reciprocally link elements of an nX5 array either to themselves or to exactly two horizontal, diagonal or antidiagonal neighbors.at n=5A220722
• T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal, diagonal or antidiagonal neighbors.at n=50A220725
• 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=4A220730