A219893 Number of directed 6-regular graphs on n nodes.

1, 7, 5021, 79818336, 1775668832509

Offset

7,2

Links

Table of n, a(n) for n=7..11.

Gunnar Brinkmann, Generating regular directed graphs, Discrete Math., 313 (2012), 1-7.

Crossrefs

Column k=6 of A350910.

Cf. A096368, A219889, A219890, A219891, A219892.

Sequence in context: A364640 A340292 A095155 * A243780 A246519 A062644

Adjacent sequences: A219890 A219891 A219892 * A219894 A219895 A219896

Keyword

nonn,more

Author

N. J. A. Sloane, Nov 30 2012

Status

approved