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 A273987 #7 Jun 23 2016 18:27:04 %S A273987 509203,63064644938,9,346802,84687,408034255082,14,4,10176,862,25,302, %T A273987 4,36370321851498,9,86,246,144,8,560,4461,476,4,36,149,8,144,4,1369, %U A273987 134718,10,16,6,287860,4,7772,13,4,81,8,15137,672,4,22564,8177,14,3226,36,16 %N A273987 Smallest Riesel number to base n. %C A273987 a(2), a(3), a(5), a(6), a(7), a(10), a(15), a(22), a(23), a(30), ... are only conjectural (see links). %H A273987 Gary Barnes, <a href="http://www.noprimeleftbehind.net/crus/Riesel-conjectures.htm">Riesel conjectures and proofs</a>. %H A273987 Gary Barnes, <a href="http://www.noprimeleftbehind.net/crus/Riesel-conjectures-powers2.htm">Riesel conjectures and proofs, Powers of 2</a>. %H A273987 Gary Barnes, <a href="http://www.noprimeleftbehind.net/crus/tab/CRUS_tab.htm">Condensed table of all conjectures for bases ≤ 1030</a>. %H A273987 Wikipedia, <a href="http://en.wikipedia.org/wiki/Riesel_number">Riesel number</a>. %Y A273987 Cf. A076337, A101036. %K A273987 nonn,hard %O A273987 2,1 %A A273987 _Tim Johannes Ohrtmann_, Jun 06 2016