Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal and vertical neighbors, without consecutive collinear links.
A220612
Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal and vertical neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =13a(2) =43a(3) =281a(4) =1277a(5) =7041a(6) =34981a(7) =183920a(8) =937663a(9) =4861869a(10) =24977087a(11) =128971605a(12) =664092737a(13) =3424806465a(14) =17647051243a(15) =90973240309a(16) =468858278192
External references
- oeis: A220612