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A324445 Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals one. 2
1, 2, 11, 74, 652, 7069, 90946, 1353554, 22870541, 432424178, 9044698456, 207336529399, 5168830168426, 139221843251594, 4028994710377547, 124670425690921634, 4107486007743301396, 143555848444786921189, 5304751937400100397626, 206646474536314180818218 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..404

FORMULA

a(n) = A001147(n) - A003436(n).

CROSSREFS

Column k=1 of A324429.

Cf. A001147, A003436.

Sequence in context: A166992 A058789 A212028 * A158265 A321387 A309146

Adjacent sequences:  A324442 A324443 A324444 * A324446 A324447 A324448

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Feb 28 2019

STATUS

approved

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Last modified November 21 22:16 EST 2019. Contains 329383 sequences. (Running on oeis4.)