login
A243392
Number of isomorphism classes of connected 3-regular simple graphs of order 2n with loops and semi-edges allowed.
3
2, 3, 4, 12, 22, 68, 166, 534, 1589, 5464, 18579, 68320, 255424, 1000852, 4018156, 16671976, 70890940, 309439942, 1381815168, 6310880471, 29428287639, 140012980007, 678970863717, 3353545264060, 16857749613964, 86191265140699, 447951112379963, 2365177154077186
OFFSET
1,1
LINKS
G. Brinkmann, N. Van Cleemput, T. Pisanski, Generation of various classes of trivalent graphs, Theoretical Computer Science 502, 2013, pp.16-29.
CROSSREFS
Differs from A243391 only in the first term.
Sequence in context: A295620 A007499 A117555 * A239943 A295754 A059810
KEYWORD
nonn
AUTHOR
Nico Van Cleemput, Jun 04 2014
EXTENSIONS
a(23)-a(28) from Andrew Howroyd, May 06 2021
STATUS
approved