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%I #12 Oct 30 2017 04:31:49
%S 3,5,13,43,79,101,107,227,353,7393,50287
%N Numbers n such that (22^n+1)/23 is a prime.
%C Some of the larger terms may only correspond to probable primes.
%C a(12) > 10^5 - _Robert Price_, Jun 02 2013
%H H. Dubner and T. Granlund, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL3/DUBNER/dubner.html">Primes of the Form (b^n+1)/(b+1)</a>, J. Integer Sequences, 3 (2000), #P00.2.7.
%o (PARI) isok(n) = (denominator(p=(22^n+1)/23)==1) && isprime(p); \\ _Michel Marcus_, Oct 30 2017
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Sep 15 2000
%E a(11) from _Robert Price_, Jun 02 2013
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