A133236 Number of bipartite planar graphs with 2n nodes and at least one zero eigenvector.

0, 1, 0, 1, 11, 8, 70, 613, 1225, 11330, 120628

Offset

2,5

References

Sciriha, I. and Fowler, P.W., Nonbonding Orbitals in Fullerenes: Nuts and Cores in Singular Polyhedral Graphs J. Chem. Inf. Model., 47, 5, 1763 - 1775, 2007.

Links

Table of n, a(n) for n=2..12.

Crossrefs

Cf. A000109, A007083, A133237.

Sequence in context: A206420 A304699 A377042 * A038322 A299972 A378899

Adjacent sequences: A133233 A133234 A133235 * A133237 A133238 A133239

Keyword

nonn

Author

N. J. A. Sloane, Oct 14 2007

Status

approved