

A231091


Number of distinct (modulo reflection and rotation) unicursal star polygons (not necessarily regular, no edge joins adjacent vertices) that can be formed by connecting the vertices of a regular ngon.


2



0, 0, 0, 0, 1, 1, 5, 27, 175, 1533, 14361, 151575, 1735869, 21594863
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,7


COMMENTS



LINKS



EXAMPLE

For n=5, only solution is the regular pentagram.
For n=6, only solution is the unicursal hexagram (see Wikipedia link).
For n=7, two regular heptagrams and three irregular forms are possible.


CROSSREFS



KEYWORD

nonn,nice


AUTHOR



STATUS

approved



