A324447 - OEIS

A324447

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

%I #5 Feb 28 2019 12:52:48

%S 1,6,57,678,9375,146334,2555228,49498389,1054882116,24545326598,

%T 619415271672,16854164945997,491956017936245,15335174679459134,

%U 508475723159116576,17870522292434937714,663618269365250877446,25964529622925026990819,1067602511902741954478695

%N Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals three.

%H Alois P. Heinz, <a href="/A324447/b324447.txt">Table of n, a(n) for n = 3..404</a>

%F a(n) = A306386(n) - A324430(n).

%Y Column k=3 of A324429.

%Y Cf. A306386, A324430.

%K nonn

%O 3,2

%A _Alois P. Heinz_, Feb 28 2019