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 A075550 #9 Feb 27 2020 07:05:27 %S A075550 1,1,1,3,4,4,8,9,9 %N A075550 Irredundance number for kings graph K(n). %H A075550 O. Favaron et al., <a href="https://doi.org/10.1016/S0012-365X(02)00494-6">Irredundance and domination in kings graphs</a>, Discrete Math., 262 (2003), 131-147. %H A075550 Matthew D. Kearse and Peter B. Gibbons, <a href="http://ajc.maths.uq.edu.au/pdf/23/ocr-ajc-v23-p253.pdf">Computational Methods and New Results for Chessboard Problems</a>, Australasian Journal of Combinatorics 23 (2001), 253-284. %K A075550 nonn,more %O A075550 1,4 %A A075550 _N. J. A. Sloane_, Oct 16 2002