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 A242715 #19 Oct 10 2019 01:16:12 %S A242715 3,3,3,3,7,11,19,31,73,79,131,151,271,331,631,811,937,1171,2731,3511, %T A242715 3511,6553,8191,10531,15121,23311,65521,86113,87211,107251,121369, %U A242715 262657,348031,409891,446473,1024921,1969111,4633201,7623851,18837001,22366891,29121769 %N A242715 Prime divisors of 2^3510-1, listed with multiplicities. %H A242715 Amiram Eldar, <a href="/A242715/b242715.txt">Table of n, a(n) for n = 1..71</a> %H A242715 factordb, <a href="http://factordb.com/index.php?query=2%5E3510-1">Factors of 2^3510-1</a>. %H A242715 Gerard P. Michon, <a href="http://www.numericana.com/data/wieferich.htm">Wieferich Primes 1093 and 3511</a> %o A242715 (PARI) forprime(n=2, 1e6, m=n; while(Mod(2,m)^3510-1==0, print1(n, ", "); m=m*n)) %Y A242715 The corresponding sequence for 1093 is A172290. %Y A242715 Cf. A001220. %K A242715 nonn,fini,full %O A242715 1,1 %A A242715 _Felix Fröhlich_, May 21 2014 %E A242715 More terms from _Amiram Eldar_, Oct 07 2019