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 A293920 #6 Oct 25 2017 18:06:49 %S A293920 1,159,7564,245964,6996588,193799140,5489211751,162272284974, %T A293920 5047554996855,165595774518042,5728636935767404,208700950019470460, %U A293920 7993330299623656154,321268248361695869991,13525506763517368392668,595415097485805608016210,27361311228606445955339071 %N A293920 Number of linear chord diagrams having n chords and minimal chord length seven. %H A293920 Alois P. Heinz, <a href="/A293920/b293920.txt">Table of n, a(n) for n = 7..405</a> %F A293920 a(n) ~ (exp(-6) - exp(-7)) * 2^(n + 1/2) * n^n / exp(n). - _Vaclav Kotesovec_, Oct 25 2017 %Y A293920 Column k=7 of A293881. %K A293920 nonn %O A293920 7,2 %A A293920 _Alois P. Heinz_, Oct 19 2017