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A374842
Number of 7-regular labeled graphs on 2n nodes.
1
1, 0, 0, 0, 1, 286884, 480413921130, 1803595358964773088, 15138592322753242235338875, 271849772205948458085090804526392, 9883018890803233316233360724489799227748, 689121157937951859333538097288863665976145304960
OFFSET
0,6
COMMENTS
These entries are generated by a linear recurrence.
EXAMPLE
For example, for n=4, a(4)=1 indicates that there is a single 7-regular graph on 2n=8 vertices. Specifically, this is the complete graph.
CROSSREFS
Alternating terms of column k=7 of A059441.
Cf. A165628 (unlabeled case).
Sequence in context: A249633 A157112 A272444 * A250824 A209957 A237702
KEYWORD
nonn
AUTHOR
Marni Mishna, Jul 23 2024
STATUS
approved