A007085 Number of unlabeled trivalent 3-connected bipartite planar graphs with 2n nodes without subgraphs R1 and R4. (Formerly M2224)

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

Offset

2,12

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

Table of n, a(n) for n=2..24.

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.

Sequence in context: A363233 A159970 A096374 * A094648 A096975 A145174

Adjacent sequences: A007082 A007083 A007084 * A007086 A007087 A007088

Keyword

nonn,more

Author

N. J. A. Sloane, Mira Bernstein

Extensions

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

Status

approved