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 A094474 #20 Sep 08 2022 08:45:13
%S A094474 5,13,7,97,11,61,463,401,577,4621,35839,5521,4057,369181,241,14177,
%T A094474 7039,181,555029,3121,92233,2414250301,13249,41432641,513101,13761229,
%U A094474 377604937,3001769,148466603,24001,22674269,1607133116929,22270249,1282861452271981,392943879511
%N A094474 a(n) is the largest prime factor of 2^n + 3^n.
%H A094474 Amiram Eldar, <a href="/A094474/b094474.txt">Table of n, a(n) for n = 1..546</a> (terms 1..120 from Vincenzo Librandi)
%F A094474 a(n) = A006530(A007689(n)). - _Amiram Eldar_, Dec 27 2019
%e A094474 n = 100, 2^100 + 3^100 = 41 * 97 * 281 * 3121 * 742801 * 20017001 * 9937984196743741414107401 so a(100) = 9937984196743741414107401.
%t A094474 Table[Part[Reverse[Flatten[FactorInteger[2^w + 3^w]]], 2], {w, 1, 100}]
%o A094474 (Magma) [Max(PrimeFactors(2^n + 3^n)):n in[1..68]]; // _Vincenzo Librandi_, Dec 25 2019
%Y A094474 Cf. A006530, A007689.
%K A094474 nonn
%O A094474 1,1
%A A094474 _Labos Elemer_, Jun 01 2004
%E A094474 a(34)-a(35) from _Vincenzo Librandi_, Dec 25 2019