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A246969 Erroneous version of A246970. 1
1, 2, 31, 1272, 105720, 15492600, 3621844800 (list; graph; refs; listen; history; text; internal format)
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

LINKS

Table of n, a(n) for n=1..7.

R. C. Read, Letter to N. J. A. Sloane, Feb 04 1971

CROSSREFS

Sequence in context: A263075 A217766 A246970 * A134646 A197320 A239332

Adjacent sequences:  A246966 A246967 A246968 * A246970 A246971 A246972

KEYWORD

dead

AUTHOR

N. J. A. Sloane, Sep 09 2014

STATUS

approved

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Last modified July 20 15:59 EDT 2019. Contains 325185 sequences. (Running on oeis4.)