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%I #22 Mar 08 2024 11:59:18
%S 2,6,8,12,44,48,512,1088,1104,6038
%N Numbers n such that 7^n - n is prime.
%C a(11) > 92000. - _Giovanni Resta_, Apr 08 2013
%C a(11) > 2*10^5. - _Robert Price_, Feb 11 2014
%o (PARI) forstep(n=2,10^4,2,if(ispseudoprime(7^n-n),print1(n,", "))); /* _Joerg Arndt_, Apr 07 2013 */
%Y Cf. A048744, A058037, A057908, A058046, A058829, A224468.
%K nonn,more
%O 1,1
%A _Alex Ratushnyak_, Apr 06 2013
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