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Erroneous version of A001500.
1

%I #8 Sep 09 2014 00:55:38

%S 1,4,55,2008,153040,20987840,4672874360

%N Erroneous version of A001500.

%D R. C. Read, Some Enumeration Problems in Graph Theory. Ph.D. Dissertation, Department of Mathematics, Univ. London, 1958.

%H R. C. Read, <a href="/A002831/a002831.pdf">Letter to N. J. A. Sloane, Feb 04 1971</a>

%Y Cf. A001500.

%K dead

%O 1,2

%A _N. J. A. Sloane_, Sep 09 2014