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 A086907 #16 Dec 26 2017 18:20:25 %S A086907 1,2,8,58,802,20834,1051586,102233986,19614424834,7355623374338 %N A086907 Duplicate of A132186. %Y A086907 Cf. A081080, A132186. %K A086907 dead %O A086907 0,2