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 A308814 #19 Jun 05 2021 06:27:49
%S A308814 1,3,10,69,626,7819,117650,2097673,43046803,1000010011,25937424602,
%T A308814 743008621405,23298085122482,793714780783695,29192926025441476,
%U A308814 1152921504875286545,48661191875666868482,2185911559749718382455,104127350297911241532842,5242880000000512000168021
%N A308814 a(n) = Sum_{d|n} n^(d-1).
%H A308814 Seiichi Manyama, <a href="/A308814/b308814.txt">Table of n, a(n) for n = 1..387</a>
%F A308814 a(n) = A308813(n,n).
%F A308814 a(n) = A066108(n)/n.
%F A308814 a(n) ~ n^(n-1). - _Vaclav Kotesovec_, Jun 05 2021
%t A308814 Table[Total[n^(Divisors[n]-1)],{n,20}] (* _Harvey P. Dale_, Aug 08 2019 *)
%o A308814 (PARI) {a(n) = sumdiv(n, d, n^(d-1))}
%Y A308814 Cf. A066108, A082245, A262843, A308813.
%K A308814 nonn
%O A308814 1,2
%A A308814 _Seiichi Manyama_, Jun 26 2019