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A324448
Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals four.
2
1, 10, 141, 2107, 35568, 661329, 13444940, 297333278, 7122103435, 183969320652, 5102519835609, 151340386825771, 4782068352314304, 160422533608810186, 5695524314835911655, 213389274860898491690, 8414796730663230017112, 348422910620718837979244
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OFFSET
4,2
LINKS
Alois P. Heinz,
Table of n, a(n) for n = 4..404
FORMULA
a(n) =
A324430
(n) -
A324431
(n).
CROSSREFS
Column k=4 of
A324429
.
Cf.
A324430
,
A324431
.
Sequence in context:
A254834
A093470
A093471
*
A379547
A277310
A343689
Adjacent sequences:
A324445
A324446
A324447
*
A324449
A324450
A324451
KEYWORD
nonn
AUTHOR
Alois P. Heinz
, Feb 28 2019
STATUS
approved
