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 A038833 #18 Jul 22 2022 17:46:13
%S A038833 2,5,23,103,419,1543,5519,19289,65687,220861,733561,2412779,7867547,
%T A038833 25485211,82064027,262960091,839001721,2666790167,8448283757,
%U A038833 26684834641,84064182061,264194301347,828513359549,2593131866483,8101615860589,25270000074757,78701296245541,244766272211729,760254097357847,2358539553316997
%N A038833 3^n-th prime.
%H A038833 Charles R Greathouse IV, <a href="/A038833/b038833.txt">Table of n, a(n) for n = 0..36</a>
%t A038833 Table[Prime[3^n], {n, 0, 23}]
%o A038833 (PARI) a(n)=prime(3^n) \\ _Charles R Greathouse IV_, Nov 02 2014
%Y A038833 Cf. A033844, A006988.
%K A038833 nonn,hard
%O A038833 0,1
%A A038833 _Jeff Burch_
%E A038833 a(24)-a(29) from _Charles R Greathouse IV_, Nov 02 2014