%I A108053
%S A108053 0,2,2,5,2,3,2,3,2,5,2,3,2,3,2,5,2,3,2,3,2,5,2,3,2,3,2,7,2,3,2,3,2,5,2,
%T A108053 3,2,3,2,5,2,3,2,3,2,5,2,3,2,3,2,5,2,3,2,3,2,7,2,3,2,3,2,5,2,3,2,3,2,5,
%U A108053 2,3,2,3,2,5,2,3,2,3,2,5,2,3,2,3,2,7,2,3,2,3,2,5,2,3,2,3,2,5,2,3,2,3,2
%N A108053 Maximum number of diagonals of a regular n-gon that meet at a non-center 
               point.
%H A108053 B. Poonen and M Rubinstein, <a href="http://arXiv.org/abs/math/9508209">
               The Number of Intersection Points Made by the Diagonals of a Regular 
               Polygon</a>, 1995.
%H A108053 <a href="Sindx_Pol.html#Poonen">Sequences formed by drawing all diagonals 
               in regular polygon</a>
%F A108053 Starting at a(5) = 2, sequence is periodic with period 30.
%e A108053 In a 30-gon, there are non-center points where 7 diagonals meet, but 
               no more than 7. Hence a(30) = 7.
%Y A108053 Sequence in context: A155679 A159580 A021448 this_sequence A133501 A124316 
               A061034
%Y A108053 Adjacent sequences: A108050 A108051 A108052 this_sequence A108054 A108055 
               A108056
%K A108053 easy,nonn
%O A108053 3,2
%A A108053 David W. Wilson (davidwwilson(AT)comcast.net), Jun 01 2005