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A230367
Number of colorings of the edges of the complete graph on n unlabeled vertices using at most three interchangeable colors under the symmetries of the full edge permutation group.
2
1, 3, 15, 142, 4300, 384199, 98654374, 70130880569, 136638863494089, 730439999032117301, 10764688922047900738650, 439762062635963206090747374, 50066701349010686289507943943535, 15962815411172611585301863116082363362, 14314975828662356561039590680011420432741442, 36247244119877673111912410070361564495415461430358
OFFSET
2,2
REFERENCES
Harary and Palmer, Graphical Enumeration, Chapter Six.
CROSSREFS
Cf. A007869.
Sequence in context: A203417 A086228 A288456 * A293844 A181535 A162078
KEYWORD
nonn
AUTHOR
Marko Riedel, Dec 20 2013
STATUS
approved