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%I #5 Sep 04 2017 19:28:51
%S 43,337,117643,40353601,558545864083284001,1341068619663964900801,
%T 7730993719707444524137094401,
%U 256923577521058878088611477224235621321601,4318114567396436564035293097707728087552248843
%N Prime numbers of the form 7^k - 6.
%H Robert Price, <a href="/A291861/b291861.txt">Table of n, a(n) for n = 1..10</a>
%H F. Firoozbakht, M. F. Hasler, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL13/Hasler/hasler2.html">Variations on Euclid's formula for Perfect Numbers</a>, JIS 13 (2010) #10.3.1.
%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop">PRP Records</a>
%H OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t Select[Table[7^k - 6], {k, 1, 100}], PrimeQ[#] &]
%Y Cf. A191469.
%K nonn
%O 1,1
%A _Robert Price_, Sep 04 2017