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 A289425 #7 Jul 06 2017 16:50:22 %S A289425 0,4,6,8,10,12,14,22,30,46 %N A289425 a(n) = length of longest circuit code K(n,4). %H A289425 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 A289425 Cf. A000937, A289424, A289426. %K A289425 nonn,more %O A289425 1,2 %A A289425 _N. J. A. Sloane_, Jul 06 2017