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A293922 Number of linear chord diagrams having n chords and minimal chord length nine. 2
1, 639, 69676, 4100988, 184283856, 7306919616, 275875184700, 10345618038532, 394140369614751, 15439822086531614, 625906719760828175, 26339564820084748490, 1152078058596976970932, 52386933718575091061064, 2475581777015155231108104, 121493777824620584462513636 (list; graph; refs; listen; history; text; internal format)
OFFSET

9,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 9..200

FORMULA

a(n) ~ (exp(-8) - exp(-9)) * 2^(n + 1/2) * n^n / exp(n). - Vaclav Kotesovec, Oct 25 2017

CROSSREFS

Column k=9 of A293881.

Sequence in context: A200710 A250661 A250587 * A027885 A097105 A233911

Adjacent sequences:  A293919 A293920 A293921 * A293923 A293924 A293925

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Oct 19 2017

STATUS

approved

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Last modified November 27 20:49 EST 2021. Contains 349395 sequences. (Running on oeis4.)