Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without consecutive collinear links.

A220679

Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without consecutive collinear links.

Terms

    a(0) =1a(1) =169a(2) =4604a(3) =220299a(4) =9973284a(5) =455249977a(6) =21051034046a(7) =969333059888

External references