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 A152068 #5 Jan 13 2020 11:01:47 %S A152068 0,0,0,48,1900,110688 %N A152068 Exceptional Ucycles on 2n+1 nodes. %C A152068 See reference for precise definition. %H A152068 K. Casteels and B. Stevens, <a href="https://doi.org/10.1016/j.disc.2009.03.002">Universal cycles of (n-1)-partitions of an n-set</a>, Discr. Math., 309 (2009), 5332-5340. %Y A152068 Cf. A152029, A152069. %K A152068 nonn,more %O A152068 1,4 %A A152068 _N. J. A. Sloane_, Sep 15 2009