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 A320484 #4 Oct 22 2018 21:09:46 %S A320484 1,20,75,382,1804,7888,36627,166217,755680 %N A320484 Row 5 of array in A320500. %Y A320484 Cf. A320500. %K A320484 nonn,more %O A320484 1,2 %A A320484 _N. J. A. Sloane_, Oct 22 2018, based on email from _Don Knuth_, Oct 20 2018