Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #26 Nov 12 2017 09:34:00
%S 1,3,9,11,33,99
%N Divisors of 99.
%C For all k, a(n) divides k if and only if a(n) divides the base 10 reverse of k (A004086(k)).
%H David Radcliffe, <a href="/A018282/a018282.pdf">A property of the divisors of 99</a>
%H <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a>
%t Divisors[99] (* _Alonso del Arte_, Nov 09 2017 *)
%o (PARI) divisors(99) \\ _Charles R Greathouse IV_, Feb 21 2013
%K nonn,fini,full,easy
%O 1,2
%A _N. J. A. Sloane_