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%I #3 Feb 20 2005 03:00:00
%S 1,1,2,4,8,13
%N Erroneous version of A000598.
%D N. L. Biggs et al., Graph Theory 1736-1936, Oxford, 1976, p. 62 (quoting Cayley, who is wrong).
%D A. Cayley, On the mathematical theory of isomers, Phil. Mag. vol. 67 (1874), 444-447 (a(6) is wrong).
%K dead
%O 1,3