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A246969
Erroneous version of A246970.
1
1, 2, 31, 1272, 105720, 15492600, 3621844800
OFFSET
1,2
COMMENTS
This is the "connected" version of the problem studied by Read in A001500. Since the terms a(6) and a(7) for A001500 given in his letter (and presumably also in his dissertation) are known to be wrong, it is extremely likely that the values of a(6) and a(7) shown here are also wrong.
REFERENCES
R. C. Read, Some Enumeration Problems in Graph Theory. Ph.D. Dissertation, Department of Mathematics, Univ. London, 195
CROSSREFS
Sequence in context: A263075 A217766 A246970 * A358567 A134646 A368354
KEYWORD
dead
AUTHOR
N. J. A. Sloane, Sep 09 2014
STATUS
approved