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 A289983 #16 Jun 17 2025 03:00:13
%S A289983 211,6529,387420457,10460353171,834385168331080533771857328695251,
%T A289983 11972515182562019788602740026717047105649,
%U A289983 228532044137599177017869183161846685251274404207185590172004697234871412029099114058771
%N A289983 Primes of the form 3^k - 32.
%H A289983 Robert Price, <a href="/A289983/b289983.txt">Table of n, a(n) for n = 1..8</a>
%H A289983 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 A289983 Henri and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop">PRP Records</a>
%H A289983 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%F A289983 a(n) = 3^A219049(n) - 32. - _Elmo R. Oliveira_, Nov 12 2023
%t A289983 Select[Table[3^k - 32, {k, 4, 100}], PrimeQ[#] &]
%Y A289983 Cf. A000040, A219049 (corresponding k's).
%K A289983 nonn
%O A289983 1,1
%A A289983 _Robert Price_, Sep 02 2017