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?

I just understood that my posting was totally wrong

Edited on December 27, 2004, 7:36 pm

This is n + number of regions in a regular n-gon with all diagonals drawn.

Which is n + Sloane's A007678

I think the above might be correct.

Edited on December 27, 2004, 8:14 pm

Posted by Hugo on 2004-12-27 19:34:47