A324448 Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals four.

1, 10, 141, 2107, 35568, 661329, 13444940, 297333278, 7122103435, 183969320652, 5102519835609, 151340386825771, 4782068352314304, 160422533608810186, 5695524314835911655, 213389274860898491690, 8414796730663230017112, 348422910620718837979244

Offset: 4

Author

Alois P. Heinz, Feb 28 2019

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 4..404

Crossrefs

Column k=4 of A324429.

Cf. A324430, A324431.

Formula

a(n) = A324430(n) - A324431(n).