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 A027895 #27 Jul 08 2025 17:57:44 %S A027895 1,3,9,11,33,41,99,123,271,369,451,813,1353,2439,2981,4059,8943,9091, %T A027895 11111,26829,27273,33333,81819,99999,100001,122221,300003,366663, %U A027895 372731,900009,1099989,1118193,2463661,3354579,4100041,7390983,12300123,22172949 %N A027895 Divisors of 9999999999. %H A027895 Nathaniel Johnston, <a href="/A027895/b027895.txt">Table of n, a(n) for n = 1..48</a> (full sequence) %H A027895 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A027895 Divisors[9999999999] (* _Harvey P. Dale_, Aug 08 2013 *) %o A027895 (PARI) divisors(10^10-1) \\ _Charles R Greathouse IV_, Jun 21 2017 %K A027895 nonn,fini,full,easy %O A027895 1,2 %A A027895 _N. J. A. Sloane_