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 A210769 #17 Dec 03 2017 17:16:36 %S A210769 6,336,3995,23520,102795,335656,1039626,2674440,6223140 %N A210769 Erroneous version of A295925. %C A210769 Included in accordance with OEIS policy of including incorrect sequences to serve as pointers to the correct versions. %H A210769 Williamson, S. G. <a href="http://dx.doi.org/10.1016/0012-365X(72)90043-X">The combinatorial analysis of patterns and the principle of inclusion-exclusion</a>. Discrete Math. 1 (1972), no. 4, 357--388. MR0299493 (45 #8541) %K A210769 dead %O A210769 2,1