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Number of graphs with n nodes that are Hamiltonian and Eulerian.
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%I #13 Aug 15 2017 13:55:51

%S 1,0,1,1,2,5,21,120,1312,26525,1073690,84471633

%N Number of graphs with n nodes that are Hamiltonian and Eulerian.

%H Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a>

%H T. Hoppe and A. Petrone, <a href="http://arxiv.org/abs/1408.3644">Integer sequence discovery from small graphs</a>, arXiv preprint arXiv:1408.3644 [math.CO], 2014.

%H F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version a1db88e

%Y Cf. A003216 (Hamiltonian graphs), A003049 (Eulerian graphs).

%K nonn,more

%O 1,5

%A _Travis Hoppe_ and _Anna Petrone_, Jun 02 2014

%E a(10)-a(11) added using tinygraph by _Falk Hüffner_, Aug 15 2017