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