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%I #9 Jul 26 2019 08:04:06
%S 1,1,6,24,109,477,2155,9647,43621,197767,901436,4125636,18964119
%N Numbers of perifusenes with one internal vertex (see Cyvin et al. for precise definition).
%H S. J. Cyvin, F. Zhang and J. Brunvoll, <a href="https://dx.doi.org/10.1007/BF01164209">Enumeration of perifusenes with one internal vertex: A complete mathematical solution</a>, J. Math. Chem., 11 (1992), 283-292.
%F a(n) = A038380(n) for n >= 3. - _Georg Fischer_, Nov 02 2018
%Y Cf. A038380.
%K nonn
%O 3,3
%A _N. J. A. Sloane_, Sep 24 2006