A204326 Number of cubic graphs on 2n nodes with chromatic number 3.

0, 0, 1, 4, 17, 80, 496

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 76-WSK-01, Technological University Eindhoven, Dept. Mathematics, 1976.

Crossrefs

Cf. A002851.

Sequence in context: A371915 A245377 A351150 * A151250 A174810 A121545

Adjacent sequences: A204323 A204324 A204325 * A204327 A204328 A204329

Keyword

nonn,more

Author

N. J. A. Sloane, Jan 14 2012

Status

approved