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 A018282 #26 Nov 12 2017 09:34:00 %S A018282 1,3,9,11,33,99 %N A018282 Divisors of 99. %C A018282 For all k, a(n) divides k if and only if a(n) divides the base 10 reverse of k (A004086(k)). %H A018282 David Radcliffe, <a href="/A018282/a018282.pdf">A property of the divisors of 99</a> %H A018282 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018282 Divisors[99] (* _Alonso del Arte_, Nov 09 2017 *) %o A018282 (PARI) divisors(99) \\ _Charles R Greathouse IV_, Feb 21 2013 %K A018282 nonn,fini,full,easy %O A018282 1,2 %A A018282 _N. J. A. Sloane_