A246969 Erroneous version of A246970.

1, 2, 31, 1272, 105720, 15492600, 3621844800

Offset: 1

Author

N. J. A. Sloane, Sep 09 2014

Keywords

• dead

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

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