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A123537
Erroneous version of A005644 (there appears to be a typo in a(9)).
0
1, 26, 1768, 225096, 51725352, 21132802554, 15463799747936, 20604021770403328, 50928019401158515328, 237644423948928994197504, 2125373296900166452199861760
OFFSET
4,2
REFERENCES
Walsh, T. R. S.; Counting labeled three-connected and homeomorphically irreducible two-connected graphs. J. Combin. Theory Ser. B 32 (1982), no. 1, 1-11.
CROSSREFS
Sequence in context: A300578 A217228 A005644 * A220503 A054597 A005643
KEYWORD
dead
STATUS
approved