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 A094030 #7 Apr 20 2014 03:13:42 %S A094030 1,0,2,0,8,0,23,0,71,0,225,0,746,0,2555,0,8999,0,32297,0 %N A094030 Number of n-crossing knots with alternating braids of 3 strands. %D A094030 K. Murasugi and B. J. Kurpita, A Study of Braids, Kluwer Academic Publishers (1999), pp. 127-166 %H A094030 T. A. Gittings, <a href="http://www.arXiv.org/abs/math.GT/0401051">Minimum braids: a complete invariant of knots and links</a>. %H A094030 V. F. R. Jones, <a href="http://www.jstor.org/stable/1971403">Hecke algebra representations of braid groups and link polynomials</a>, Ann. of Math., 126 (1987), pp. 335-388. %e A094030 4 crossing knot (1 component link) can be represented as 3-strand braid AbAb that is alternating (overcrossings and undercrossing alternate). %Y A094030 Cf. A094029, A094031, A094032. %K A094030 nonn,more %O A094030 4,3 %A A094030 _Thomas A. Gittings_, Apr 22 2004