OFFSET
1,3
COMMENTS
a(7)=9 is only a conjecture at present. I include it in the Data line to disambiguate this sequence from its neighbors.
For straight line segments the answer is conjectured to be 2n-2 for all n >=3, with a(1)=1, a(2)=3.
LINKS
S. W. Golomb and John Selfridge, Unicursal Polygonal Paths and Other Graphs on Point Lattices, Pi Mu Epsilon Journal 5 (1970) 107-117.
Ed Pegg, Jr., Connect the dots - Arcs
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Mar 12 2011
STATUS
approved