OFFSET
3,2
COMMENTS
Should a(7) be 68909400? - Andrew Howroyd, May 23 2018
REFERENCES
R. C. Read, Some Enumeration Problems in Graph Theory. Ph.D. Dissertation, Department of Mathematics, Univ. London, 1958.
LINKS
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 08 2014
STATUS
approved