Two or more spots are placed anywhere on a circle's circumference. Every pair is joined by a straight line. Given n spots, what is the maximum number of regions into which the circle can be divided?
(In reply to re: researched
Actually, it's Sloane's A000127 http://www.research.att.com/projects/OEIS?Anum=A000127
Posted by Charlie
on 2004-12-28 17:27:47