%I #15 Feb 05 2019 14:01:39
%S 1,1,2,6,31,255,2788,37333,578799,10134071,197394232,4231417728,
%T 98991987830,2510081238264,68583045013542,2009094843480565,
%U 62824038815664719,2088829704241946181,73591470349452760456,2738742863175749456078
%N Number of connected chord diagrams of degree n.
%H Alexander Stoimenow, <a href="https://doi.org/10.1016/S0012-365X(99)00347-7">On the number of chord diagrams</a>, Discr. Math. 218 (2000), 209-233.
%F a(n) = A007769(n) - A317184(n). - _Sean A. Irvine_, Feb 05 2019
%t Stoimenow states that a Mma package is available from his website. - _N. J. A. Sloane_, Jul 26 2018
%K nonn
%O 1,3
%A Alexander Stoimenow (stoimeno(AT)mail.informatik.hu-berlin.de)
%E More terms from _Sean A. Irvine_, Feb 05 2019