A133237 - OEIS

A133237

Number of bipartite planar graphs with 2n nodes and exactly one zero eigenvector.

0, 0, 0, 1, 2, 7, 67, 322, 1123, 10548, 81127

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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, A133236.

Sequence in context: A042051 A196925 A246865 * A099660 A341088 A207978

Adjacent sequences: A133234 A133235 A133236 * A133238 A133239 A133240

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 14 2007

STATUS

approved