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 A048171 #6 Nov 08 2017 22:21:29 %S A048171 2,4,6,9,12,17,20,25,28,31,34 %N A048171 Erroneous version of A090178. %D A048171 M. Feenstra, P. J. Carter and C. P. Harding, The Ultimate I.Q. Book, Wardlock, see p. 99. %H A048171 L. J. Upton, <a href="/A006993/a006993_1.pdf">Letter to N. J. A. Sloane with attachments, Oct. 1993</a> %K A048171 dead %O A048171 1,1 %A A048171 _Rachel Barnett_, Nov 08 2017