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 A259470 #14 Jun 28 2017 02:58:06 %S A259470 1,2,6,12,20,34,56,88,136,234 %N A259470 Erroneous version of A003274. %H A259470 E. S. Page, <a href="/A003274/a003274.pdf">Systematic generation of ordered sequences using recurrence relations</a>, The Computer Journal 14 (1971), 150-153. (Annotated scanned copy) %H A259470 E. S. Page, <a href="https://doi.org/10.1093/comjnl/14.2.150">Systematic generation of ordered sequences using recurrence relations</a>, Computer J., 14 (1971), 150-153. %K A259470 dead %O A259470 1,2