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 A027889 #15 Jul 08 2025 17:57:10 %S A027889 1,3,9,27,37,81,111,333,999,2997,333667,1001001,3003003,9009009, %T A027889 12345679,27027027,37037037,111111111,333333333,999999999 %N A027889 Divisors of 999999999. %H A027889 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A027889 Divisors[999999999] (* _Harvey P. Dale_, Feb 14 2024 *) %o A027889 (PARI) divisors(999999999) \\ _Charles R Greathouse IV_, Jun 21 2017 %K A027889 nonn,fini,full,easy %O A027889 1,2 %A A027889 _N. J. A. Sloane_