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%I M3255 #22 Oct 09 2017 02:31:07
%S 0,0,0,0,1,1,1,4,5,14,28,86,211,648,1878,5931,18326,58746,187620,
%T 608065,1975191,6461809,21212414
%N Number of unlabeled trivalent 3-connected bipartite planar graphs with 2n nodes without subgraphs R2 and R4.
%C The graphs R2 and R4 are given on p. 281 of Holton. - _Sean A. Irvine_, Oct 09 2017
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H D. A. Holton et al., <a href="http://dx.doi.org/10.1016/0095-8956(85)90072-3">Hamiltonian cycles in cubic 3-connected bipartite planar graphs</a>, J. Combin. Theory, B 38 (1985), 279-297.
%Y Cf. A007083.
%K nonn,more
%O 2,8
%A _N. J. A. Sloane_, _Mira Bernstein_
%E Title improved, a(17) corrected and a(20)-a(24) from _Sean A. Irvine_, Oct 09 2017
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