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 A273037 #10 May 14 2016 13:43:39 %S A273037 1,3,5,11,11,19,19,23,23,23,47,53,53,53,59,59,59,59,59,59,59,59,59,59, %T A273037 59,59,59,59,59,107,107,107,107,107,107,107,107,107,107,107,107,107, %U A273037 107,107,107,107,107,107,107,107,107,107,107,163,163,167,167,167,167,167,167,167,167,167,167,167,167,167,167,167,167,167,167 %N A273037 Discriminator of the first n Fermat numbers A000215. %C A273037 The discriminator of a sequence is the least positive integer k such that the first n terms are pairwise inequivalent, modulo k. %Y A273037 Cf. A000215. %K A273037 nonn %O A273037 1,2 %A A273037 _Jeffrey Shallit_, May 13 2016