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Number of unlabeled simple planar digraphs with n nodes.
3

%I #11 Mar 10 2023 10:09:14

%S 1,3,16,218,9026,907123

%N Number of unlabeled simple planar digraphs with n nodes.

%D M. Kirchweger, M. Scheucher, and S. Szeider, SAT-Based Generation of Planar Graphs, in preparation.

%Y Directed variant of A005470.

%Y Cf. A000273

%K nonn,more

%O 1,2

%A _Manfred Scheucher_, Mar 09 2023