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A293916
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Number of linear chord diagrams having n chords and minimal chord length three.
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2
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1, 9, 79, 854, 11105, 167273, 2855096, 54426601, 1146050151, 26418261876, 661704149855, 17894827830455, 519672858520861, 16129429179859894, 532839970205194270, 18667063990244959414, 691265187531408182336, 26979801565685043088417, 1106929654165005908000185
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OFFSET
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3,2
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LINKS
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FORMULA
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a(n) ~ (exp(-2) - exp(-3)) * 2^(n + 1/2) * n^n / exp(n). - Vaclav Kotesovec, Oct 25 2017
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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