

A204326


Number of cubic graphs on 2n nodes with chromatic number 3.


0




OFFSET

1,4


COMMENTS

The number of cubic graphs on 2n nodes with chromatic number 1 begins 0, 0, 1, 1, 2, 5, 13, ... . If we had more terms this would warrant its own entry.


LINKS

Table of n, a(n) for n=1..7.
F. C. Bussemaker, S. Cobeljic, L. M. Cvetkovic and J. J. Seidel, Computer investigations of cubic graphs, T.H.Report 76WSK01, Technological University Eindhoven, Dept. Mathematics, 1976.


CROSSREFS

Cf. A002851.
Sequence in context: A056096 A257084 A245377 * A151250 A174810 A121545
Adjacent sequences: A204323 A204324 A204325 * A204327 A204328 A204329


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Jan 14 2012


STATUS

approved



