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A084279 Number of labeled 3-colorable (i.e., chromatic number <= 3) graphs on n nodes. 6
1, 2, 8, 63, 958, 27554, 1457047, 137144754, 22249524024, 6032417530135, 2663111111716110, 1876540387225350958 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

S. R. Finch, Bipartite, k-colorable and k-colored graphs

S. R. Finch, Bipartite, k-colorable and k-colored graphs, June 5, 2003. [Cached copy, with permission of the author]

F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 8c665c7

Eric Weisstein's World of Mathematics, n-Colorable Graph

CROSSREFS

Cf. A047864, A084280, A084281, A084282.

Sequence in context: A153559 A193195 A098000 * A153526 A153554 A139018

Adjacent sequences:  A084276 A084277 A084278 * A084280 A084281 A084282

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, May 25 2003

EXTENSIONS

a(7)-a(12) added using tinygraph by Falk Hüffner, Jun 20 2018

STATUS

approved

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Last modified October 20 22:44 EDT 2019. Contains 328291 sequences. (Running on oeis4.)