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A184946 Number of connected 4-regular simple graphs on n vertices with girth exactly 6. 2
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 4, 0, 19, 0, 1272, 25, 494031, 13504 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,31

COMMENTS

First differs from A058348 at n = A054760(4,7) = 67.

LINKS

Table of n, a(n) for n=0..37.

CROSSREFS

Connected 4-regular simple graphs with girth at least g: A006820 (g=3), A033886 (g=4), A058343 (g=5), A058348 (g=6).

Connected 4-regular simple graphs with girth exactly g: A184943 (g=3), A184944 (g=4), A184945 (g=5), this sequence (g=6).

Sequence in context: A244310 A156457 A058348 * A085618 A263626 A076021

Adjacent sequences:  A184943 A184944 A184945 * A184947 A184948 A184949

KEYWORD

nonn,more,hard

AUTHOR

Jason Kimberley, Feb 27 2011

STATUS

approved

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Last modified June 6 04:15 EDT 2020. Contains 334859 sequences. (Running on oeis4.)