|
%I #7 May 25 2018 14:40:53
%S 3,26,1547,146487,16018987,1985766270,278601715904
%N Number of directed 3-regular graphs on n nodes without directed 2-cycles.
%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 Cf. A096368, A219889, A219890, A219891, A219892, A219893, A219894.
%K nonn,more
%O 7,1
%A _N. J. A. Sloane_, Nov 30 2012
|
