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 A290022 #12 Jun 17 2025 02:59:43
%S A290022 29,1289,46649,1679609,10077689,60466169,470184984569,
%T A290022 3656158440062969,623673825204293256669089197883129849,
%U A290022 134713546244127343440523266742756048889,293242067884135544935936513642647623193965101049
%N A290022 Prime numbers of the form 6^k - 7.
%H A290022 Robert Price, <a href="/A290022/b290022.txt">Table of n, a(n) for n = 1..14</a>
%H A290022 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 A290022 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop">PRP Records</a>
%H A290022 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t A290022 Select[Table[6^k - 7, {k, 2, 100}], PrimeQ[#] &]
%Y A290022 Cf. A217352.
%K A290022 nonn
%O A290022 1,1
%A A290022 _Robert Price_, Sep 03 2017