A090926 - OEIS

%I #4 Dec 05 2013 19:56:44

%S 2,2,3,5,3,2,3,11,7,3,3,5,3,23,13,29,3,3,5,3,3,41,11,3,5,3,53,3,7,3,5,

%T 17,3,37,3,3,3,83,43,89,3,5,3,7,3,3,3,113,3,29,7,3,5,2,131,67,3,3,5,3,

%U 73,3,5,3,79,3,3,173,3,11,179,3,3,3,191,97,3,5,3,11,3,5,3,3,13

%N Least odd prime divisor of prime(n)-1, or a(n) = 2 if no odd prime divisors are encountered.

%e a(8) = 2 as prime(8) = 17 and 17-1 = 2^4.

%e a(10) = 7 as prime(10) = 29 and 29-1 =28 = 2*7^2.

%K base,easy,nonn

%O 2,1

%A _Amarnath Murthy_, Dec 26 2003

%E More terms from _Erich Friedman_, Aug 08 2005