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 A058259 #10 Apr 21 2016 03:54:38 %S A058259 1,2,5,16,61,279,1491,9267,66447,545173 %N A058259 Number of split semiorders on n points. %H A058259 P. C. Fishburn and J. A. Reeds, <a href="http://dx.doi.org/10.1023/A:1011967426437">Counting split semiorders</a>, Order, 18(2): 119-128, 2001. %Y A058259 Cf. A000111, A058260. %K A058259 nonn,hard,more,nice %O A058259 1,2 %A A058259 _N. J. A. Sloane_, Dec 06 2000