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 A293921 #6 Oct 25 2017 18:06:36 %S A293921 1,319,23012,1007508,35994000,1189202172,38767936708,1287523504769, %T A293921 44237669097482,1583944615087121,59277212496035478, %U A293921 2320361242104891484,94969568142679887216,4060520653281063962444,181153019365969689229302,8422282201884215125698329 %N A293921 Number of linear chord diagrams having n chords and minimal chord length eight. %H A293921 Alois P. Heinz, <a href="/A293921/b293921.txt">Table of n, a(n) for n = 8..300</a> %F A293921 a(n) ~ (exp(-7) - exp(-8)) * 2^(n + 1/2) * n^n / exp(n). - _Vaclav Kotesovec_, Oct 25 2017 %Y A293921 Column k=8 of A293881. %K A293921 nonn %O A293921 8,2 %A A293921 _Alois P. Heinz_, Oct 19 2017