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 A289424 #9 Jul 06 2017 16:50:33 %S A289424 0,4,6,8,10,16,24,36 %N A289424 a(n) = length of longest circuit code K(n,3). %H A289424 Kevin M. Byrnes, <a href="https://arxiv.org/abs/1604.02755">A new method for constructing circuit codes</a>, Bull. ICA, 80 (2017), 40-60. %Y A289424 Cf. A000937, A289425, A289426. %K A289424 nonn,more %O A289424 1,2 %A A289424 _N. J. A. Sloane_, Jul 06 2017