%I #7 Nov 26 2013 15:59:16
%S 1,3,13,65,354,2035,12151,74618,468233,2989093
%N Connected matchings with n crossings, in a disk.
%H V. Pilaud, J. Rué, <a href="http://arxiv.org/abs/1307.6440">Analytic combinatorics of chord and hyperchord diagrams with k crossings</a>, arXiv preprint arXiv:1307.6440, 2013
%Y Cf. A232223, A000699.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Nov 22 2013
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