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Table of n, a(n) for n=1..44.
(PARI) for(k=1, 120000, if(sigma(prime(k)-1)%k==0, print1(k, ", ")))
Sequence in context: A240042 A099615 A114618 * A214418 A164342 A034527
Adjacent sequences: A067755 A067756 A067757 * A067759 A067760 A067761
Benoit Cloitre, Feb 05 2002
More terms from Klaus Brockhaus, Feb 07 2002