

A372616


Number of curved edges among all distinct circles that can be constructed from the 3 vertices and the equally spaced 3*n points placed on the sides of an equilateral triangle, using only a compass.


5



12, 207, 1104, 4359, 14880, 32523, 73662, 121605, 223290, 329286, 554286, 722841, 1145091
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,1


COMMENTS

A circle is constructed for every pair of the 3 + 3*n points, the first point defines the circle's center while the second the radius distance.


LINKS



FORMULA



CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



