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%I #12 Jul 25 2019 04:36:17
%S 1,1,2,5,14,47,170,676,2834,12471,56675,264906,1264851,6150187,
%T 30357300,151798497,767573729,3919462385
%N Unrooted unlabeled connected Ptolemaic graphs on n nodes.
%H Maryam Bahrani and Jérémie Lumbroso, <a href="http://arxiv.org/abs/1608.01465">Enumerations, Forbidden Subgraph Characterizations, and the Split-Decomposition</a>, arXiv:1608.01465 [math.CO], 2016.
%K nonn,more
%O 1,3
%A _N. J. A. Sloane_, Jun 21 2017
%E Definition corrected (connected only) by _Falk Hüffner_, Jul 24 2019