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%I #8 Jun 27 2018 09:33:00
%S 2,3,7,13,17,43,83,167,313,1667,6833,8167,191833,298327,3143167,
%T 197222917,994927133,3160522105583
%N Primes in A068947.
%C a(19) > 10^13. - _Giovanni Resta_, Jun 27 2018
%e a(4)=13 since 13 is the fourth prime in A068947.
%Y Cf. A068809, A068947.
%K more,nonn,base
%O 1,1
%A Francois Jooste (phukraut(AT)hotmail.com), Mar 15 2002
%E a(16)-a(17) from _Sean A. Irvine_, Jun 07 2011
%E a(18) from _Giovanni Resta_, Jun 27 2018