This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A209901 #19 Sep 26 2015 14:41:27
%S A209901 11,125,9029,543605,1614529685,83828316389,215703854542469,
%T A209901 10789535445362645,26579017117027313525,3183060102526390833854309,
%U A209901 156448938516521406467644085,18500229372226631089176131976869,44487435359130133495783012898708549
%N A209901 7^p - 6^p - 2 with p = prime(n).
%C A209901 After 11 and 9029, there are no prime values of a(n) through 7^109 - 6^109 - 2.
%H A209901 Vincenzo Librandi, <a href="/A209901/b209901.txt">Table of n, a(n) for n = 1..100</a>
%F A209901 a(n) = A016169(A000040(n)) - 2 = A204768(n) - 1 = A000420(A000040(n)) - A000400(A000040(n)) - 2.
%e A209901 543605 is in the sequence because 543605 = 7^7 - 6^7 - 2, and 7 is prime.
%t A209901 Table[7^p - 6^p - 2, {p, Prime[Range[20]]}] (* _T. D. Noe_, Mar 15 2012 *)
%o A209901 (PARI) forprime(p=2,100,print1(7^p-6^p-2", ")) \\ _Charles R Greathouse IV_, Mar 15 2012
%Y A209901 Cf. A000040, A000400, A000420, A016169, A204768.
%K A209901 nonn,easy,less
%O A209901 1,1
%A A209901 _Jonathan Vos Post_, Mar 14 2012