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 A197318 #18 Jul 04 2024 05:35:12 %S A197318 1,3,7,11,13,21,33,37,39,77,91,101,111,143,231,259,273,303,407,429, %T A197318 481,707,777,1001,1111,1221,1313,1443,2121,2849,3003,3333,3367,3737, %U A197318 3939,5291,7777,8547,9191,9901,10101,11211,14443,15873,23331,26159,27573,29703 %N A197318 Divisors of the repunit 111111111111 = A002275(12). %C A197318 The sequence is marked "full" since even though they don't fit into the three lines above, all 128 terms are known and available in the b-file or using the given PARI code. %H A197318 M. F. Hasler, <a href="/A197318/b197318.txt">Table of n, a(n) for n = 1..128</a> (complete sequence) %H A197318 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a>. %t A197318 Divisors[111111111111] (* _Paolo Xausa_, Jul 04 2024 *) %o A197318 (PARI) divisors(1e12\9) %Y A197318 Cf. A109492, A197308, A197309, A070529, A018282, A018766, A027890-A027895, A027889. %K A197318 nonn,fini,full %O A197318 1,2 %A A197318 _M. F. Hasler_, Oct 13 2011