interesting if 
is composite and for every divisor 
of 
and 
is also a divisor of 
to 
: 
distinct points on a circle. Consider the set of distances between any two out of the 
Y by MS_asdfgzxcvb
Let 
be a sequence of positive integers with 
, 
and
![\[a_n = a_{n-1}^{a_{n-1}a_{n-2}}-1\]](//latex.artofproblemsolving.com/1/b/f/1bf1a88979e7d2b33530de979d66a4e81032953d.png)
for all 
. Show that if 
is a prime less than 
for some positive integer 
, then there exists 
such that 
.
be a sequence of positive integers with 
, 
and![\[a_n = a_{n-1}^{a_{n-1}a_{n-2}}-1\]](http://latex.artofproblemsolving.com/1/b/f/1bf1a88979e7d2b33530de979d66a4e81032953d.png)
for all 
. Show that if 
is a prime less than 
for some positive integer 
, then there exists 
such that 
.
