|
%I #10 Feb 06 2022 15:00:52
%S 1,4,92,19041,6510087,2983458766,1775668832509,1349509467853512
%N Number of directed 4-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=4 of A350910.
%Y Cf. A096368, A219889, A219890, A219892, A219893.
%K nonn,more
%O 5,2
%A _N. J. A. Sloane_, Nov 30 2012
|
