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A259882
Number of graphs with n edges having a proper labeling that is bilaterally symmetric and satisfies condition (4.1) of Sheppard (1976).
0
0, 2, 2, 6, 4, 22, 14, 102, 62
OFFSET
1,2
LINKS
David A. Sheppard, The factorial representation of major balanced labelled graphs, Discrete Math., 15(1976), no. 4, 379-388. See Table 1.
CROSSREFS
Sequence in context: A062885 A062293 A317368 * A356187 A204991 A054516
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jul 10 2015
STATUS
approved