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%I #6 Mar 30 2012 18:39:09
%S 1,9,129,47169,1049913,615504609,15797864577,11270258161281,
%T 246696657053411097,7087786816380876801,178199489594187990894537,
%U 158945391097530669380671857,4791412124651983778003371329
%N A001003(p-1)/p where p runs through the odd primes.
%F a(n)=A001003(prime(n+1)-1)/prime(n+1)
%K easy,nonn
%O 1,2
%A _Benoit Cloitre_, Oct 09 2002