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%I #14 Feb 06 2022 15:01:05
%S 1,2,23,415,19041,1104045,79818336,6958257941,720814138673,
%T 87579097910309
%N Number of directed 3-regular graphs on n nodes.
%H Gunnar Brinkmann, <a href="https://doi.org/10.1016/j.disc.2012.09.014">Generating regular directed graphs</a>, Discrete Math., 313 (2012), 1-7.
%Y Column k=3 of A350910.
%Y Cf. A096368, A219889, A219890, A219891, A219892, A219893.
%K nonn,more
%O 4,2
%A _N. J. A. Sloane_, Nov 30 2012