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Erroneous version of A000421.
0

%I #12 Oct 12 2017 04:19:43

%S 1,2,6,20,93

%N Erroneous version of A000421.

%D Cadogan, C. C. Graph-lattices and the enumeration of linear graphs. 1970 Proc. Louisiana Conf. on Combinatorics, Graph Theory and Computing (Louisiana State Univ., Baton Rouge, La., 1970) pp. 61--86 Louisiana State Univ., Baton Rouge, La. MR0269553 (42 #4448).

%K dead

%O 1,2

%A _N. J. A. Sloane_, Mar 30 2012