A007085 Number of unlabeled trivalent 3-connected bipartite planar graphs with 2n nodes without subgraphs R1 and R4.

0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 3, 1, 5, 4, 11, 20, 46, 89, 243, 525, 1359, 3316

Offset: 2

Author

N. J. A. Sloane, Mira Bernstein

Keywords

• nonn
• more

Comments

The graphs R1 and R4 are given on p. 281 of Holton. - Sean A. Irvine, Oct 09 2017

References

• N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

• D. A. Holton et al., Hamiltonian cycles in cubic 3-connected bipartite planar graphs, J. Combin. Theory, B 38 (1985), 279-297.

Crossrefs

Cf. A007083.

Extensions

Title improved and a(20)-a(24) from Sean A. Irvine, Oct 09 2017