%I
%S 0,0,1,1,3,9,44,294,2893,36496,545808,9029737,159563559,2952794985,
%T 56589742050
%N Number of twoconnected (or biconnected) planar graphs with n nodes.
%D R. C. Read and R. J. Wilson, An Atlas of Graphs, Oxford, 1998.
%D A. Gagarin, G. Labelle, P. Leroux and T. Walsh, Structure and enumeration of twoconnected graphs with prescribed threeconnected components Adv. in Appl. Math. 43 (2009), no. 1, 4674. [From Gilbert Labelle (labelle.gilbert(AT)uqam.ca), Jan 20 2009]
%Y Cf. A005142, A049336.
%K nonn
%O 1,5
%A _Brendan McKay_
%E 3 more terms from Gilbert Labelle (labelle.gilbert(AT)uqam.ca), Jan 20 2009
