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 A291859 #11 Jun 17 2025 03:14:42
%S A291859 37,331,2389,13841287189,65712362363534280139531,
%T A291859 459986536544739960976789,54116956037952111668959660837,
%U A291859 2651730845859653471779023381589
%N A291859 Prime numbers of the form 7^k - 12.
%H A291859 Robert Price, <a href="/A291859/b291859.txt">Table of n, a(n) for n = 1..10</a>
%H A291859 F. Firoozbakht and 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 A291859 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop">PRP Records</a>
%H A291859 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t A291859 Select[Table[7^k - 12, {k, 2, 100}], PrimeQ[#] &]
%Y A291859 Cf. A236371.
%K A291859 nonn
%O A291859 1,1
%A A291859 _Robert Price_, Sep 04 2017