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Number of unlabeled, connected ortho-projection graphs on n vertices.
2

%I #3 Sep 21 2005 03:00:00

%S 2,0,2,1,4,5,14,31

%N Number of unlabeled, connected ortho-projection graphs on n vertices.

%D B. Shtylla and L. Zulli, Ortho-projection graphs, in preparation.

%H L. Zulli, <a href="http://www.cs.lafayette.edu/~zullil/">Home Page</a>

%Y Cf. A081080, A081081.

%K nonn

%O 1,1

%A B. Shtylla and L. Zulli (shtyllab(AT)lafayette.edu, zullil(AT)lafayette.edu), Mar 05 2003

%E Conjecture: a(9) = 84.