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 A003538 #31 Sep 08 2022 08:44:32 %S A003538 1,3,7,9,11,21,31,33,63,77,93,99,151,217,231,279,331,341,453,651,693, %T A003538 993,1023,1057,1359,1661,1953,2317,2387,2979,3069,3171,3641,4681,4983, %U A003538 6951,7161,9513,10261,10923,11627,14043,14949,20853,21483,25487 %N A003538 Divisors of 2^30 - 1. %H A003538 T. D. Noe, <a href="/A003538/b003538.txt">Table of n, a(n) for n = 1..96</a> (all divisors) %H A003538 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A003538 Divisors[2^30-1] (* _Harvey P. Dale_, Jan 06 2013 *) %o A003538 (Magma) [Divisors(2^30-1)]; // _Vincenzo Librandi_, Jun 19 2015 %o A003538 (PARI) divisors(2^30-1) \\ _Charles R Greathouse IV_, Jun 21 2017 %K A003538 nonn,fini,full,easy %O A003538 1,2 %A A003538 _N. J. A. Sloane_