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 A096843 #17 Aug 30 2019 06:10:27 %S A096843 2,3,5,7,43,443,887,2221,8887,444443,888887,444444443,888888887, %T A096843 444444444443,888888888887,222222222222222221, %U A096843 444444444444444444444444444443,44444444444444444444444444444443 %N A096843 Primes of form repdigit - 1. Primes whose sum of divisors is a decimal repdigit. %C A096843 Union numbers 2, 5 and sequences A093171, A093163 and A091189. %C A096843 Corresponding values of sigma(a(n)) are in A028987. - _Jaroslav Krizek_, Mar 19 2013 %H A096843 Giovanni Resta, <a href="/A096843/b096843.txt">Table of n, a(n) for n = 1..33</a> (terms < 10^1000) %e A096843 n=43: sigma(43)=44; %Y A096843 Cf. A096503-A096508, A096841-A096846, A000203. %K A096843 nonn,base %O A096843 1,1 %A A096843 _Labos Elemer_, Jul 15 2004 %E A096843 Missing a(1)=2 and a(3)=5 added by _Jaroslav Krizek_, Mar 19 2013