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A243393
Number of isomorphism classes of connected 3-regular loopless simple graphs with n vertices and with semi-edges allowed.
4
1, 1, 2, 6, 10, 29, 64, 194, 531, 1733, 5524, 19430, 69322, 262044, 1016740, 4101318, 16996157, 72556640, 317558689, 1424644848, 6536588420, 30647561117, 146647344812, 715511358833, 3556531372395, 17996244725780, 92634418530686, 484756161038264
OFFSET
1,3
COMMENTS
Also: number of isomorphism classes of connected loopless simple graphs with maximum degree at most 3. - Brendan McKay, Mar 11 2020
LINKS
G. Brinkmann, N. Van Cleemput, T. Pisanski, Generation of various classes of trivalent graphs, Theoretical Computer Science 502, 2013, pp.16-29.
CROSSREFS
KEYWORD
nonn
AUTHOR
Nico Van Cleemput, Jun 04 2014
EXTENSIONS
a(24)-a(28) from Andrew Howroyd, Mar 20 2020
STATUS
approved