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 A290006 #19 Jun 17 2025 03:00:02
%S A290006 37,43,61,277,2221,19717,59083,129140197,7625597485021,
%T A290006 16677181699666603,2153693963075557766310781,
%U A290006 1570042899082081611640534597,127173474825648610542883299637,2909321189362570808630465826492242446680517
%N A290006 Primes of the form 3^k + 34.
%H A290006 Robert Price, <a href="/A290006/b290006.txt">Table of n, a(n) for n = 1..16</a>
%H A290006 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 A290006 Henri and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop">PRP Records</a>
%H A290006 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%F A290006 a(n) = 3^A219050(n) + 34. - _Elmo R. Oliveira_, Nov 12 2023
%t A290006 Select[Table[3^k+34, {k, 0, 100}], PrimeQ[#] &]
%Y A290006 Cf. A000040, A219050 (corresponding k's).
%K A290006 nonn
%O A290006 1,1
%A A290006 _Robert Price_, Sep 03 2017