Determine all possible values of a positive integer N ≥ 3, such that N
– 1 is a prime power
represents N choose
(In reply to re: No Subject
I was thinking of (n-2) and (n+1) which if neither is 1 and they produce a prime power must be each be powers of 3.
The actual factors  (.5n-1)(n+1) or  (n-2)(.5n+.5) can differ by any value.
This does not change much since exponents grow so fast that
2*p^x+3 = p^y
p^x = 2*p^y - 3
Only have solutions if p=3 anyway (p cannot be 2 due to the +3 or -3)
Posted by Jer
on 2010-04-26 15:42:02