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 A015969 #19 Aug 13 2021 13:02:20 %S A015969 1,17,289,4913,83521,1419857,6029713,12027313,24137569,85525793, %T A015969 102505121,204464321,410338673,1453938481,1742587057,3475893457, %U A015969 6975757441,24716954177,29623979969,59090188769,111612202577,118587876497,420188221009,500540685121,503607659473 %N A015969 Numbers k that divide 16^k + 1. %H A015969 Giovanni Resta, <a href="/A015969/b015969.txt">Table of n, a(n) for n = 1..34</a> (terms < 10^13) %Y A015969 Cf. A006521, A015949, A015950, A015951, A015953, A015954, A015955, A015957, A015958, A015960, A015961, A015963, A015965, A015968, A014957. %Y A015969 Column k=16 of A333429. %K A015969 nonn %O A015969 1,2 %A A015969 _Robert G. Wilson v_ %E A015969 More terms from _Max Alekseyev_, Oct 02 2010 %E A015969 Missing terms a(10), a(14), a(18), and a(23) from _Giovanni Resta_, Mar 23 2020