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 A293916 #6 Oct 25 2017 18:07:43 %S A293916 1,9,79,854,11105,167273,2855096,54426601,1146050151,26418261876, %T A293916 661704149855,17894827830455,519672858520861,16129429179859894, %U A293916 532839970205194270,18667063990244959414,691265187531408182336,26979801565685043088417,1106929654165005908000185 %N A293916 Number of linear chord diagrams having n chords and minimal chord length three. %H A293916 Alois P. Heinz, <a href="/A293916/b293916.txt">Table of n, a(n) for n = 3..404</a> %F A293916 a(n) ~ (exp(-2) - exp(-3)) * 2^(n + 1/2) * n^n / exp(n). - _Vaclav Kotesovec_, Oct 25 2017 %Y A293916 Column k=3 of A293881. %K A293916 nonn %O A293916 3,2 %A A293916 _Alois P. Heinz_, Oct 19 2017