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 A062308 #29 Oct 11 2023 16:37:03
%S A062308 2,3,61,37,7321,13421,1117,1623931,6304673,590077,212601841,58367,
%T A062308 20113,59583967,55527473,7537711,447600088289,2218331,3138426605161,
%U A062308 1390636259,1120648576818041,3421169496361,2649263870814793
%N A062308 Largest prime factor of 11^n+1 (A034524).
%H A062308 <a href="/A062308/b062308.txt">Table of n, a(n) for n = 0..325</a>
%F A062308 a(n) = A006530(A034524(n)). - _Vincenzo Librandi_, Jul 12 2016
%t A062308 Table[FactorInteger[11^n + 1][[-1, 1]], {n, 0, 20}] (* _Vincenzo Librandi_, Jul 12 2016 *)
%o A062308 (PARI) for(n=0,22,print(factor(11^n+1)))
%o A062308 (PARI) { for (n=0, 80, f=factor(11^n + 1)~; write("b062308.txt", n, " ", f[1, length(f)]) ) } \\ _Harry J. Smith_, Aug 04 2009
%o A062308 (Magma) [Maximum(PrimeDivisors(11^n+1)): n in [0..40]]; // _Vincenzo Librandi_, Jul 12 2016
%Y A062308 Cf. A006530, A034524.
%Y A062308 Cf. similar sequences listed in A274903.
%K A062308 nonn
%O A062308 0,1
%A A062308 _Jason Earls_, Jul 12 2001
%E A062308 Terms to a(80) in b-file from _Harry J. Smith_, Jun 01 2010
%E A062308 a(81)-a(301) in b-file from _Amiram Eldar_, Feb 08 2020
%E A062308 a(302)-a(325) in b-file from _Max Alekseyev_, Apr 25 2022, Oct 11 2023