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 A317184 #11 Feb 05 2019 01:43:07 %S A317184 0,1,3,12,74,647,6961,89739,1337152,22609111,427604861,8945156182, %T A317184 205080060435,5113424483894,137759755603055,3987742282544259, %U A317184 123430664010624370,4067922952436728611,142218912116692593949 %N A317184 Number of "non-connected" chord diagrams of degree n. %H A317184 Alexander Stoimenow, <a href="https://doi.org/10.1016/S0012-365X(99)00347-7">On the number of chord diagrams</a>, Discr. Math. 218 (2000), 209-233. %t A317184 Stoimenow states that a Mma package is available from his website. %Y A317184 Cf. A005034, A018225. %K A317184 nonn %O A317184 1,3 %A A317184 _N. J. A. Sloane_, Jul 26 2018 %E A317184 More terms from _Sean A. Irvine_, Feb 04 2019