Number of ways to reciprocally link elements of an 6Xn array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
A220711
Number of ways to reciprocally link elements of an 6Xn array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =1a(2) =13a(3) =60a(4) =317a(5) =1617a(6) =8338a(7) =42873a(8) =221082a(9) =1139020a(10) =5870960a(11) =30259204a(12) =155962396a(13) =803874071a(14) =4143371101a(15) =21356146495a(16) =110075467413a(17) =567360680620
External references
- oeis: A220711