A084274 - OEIS

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A084274

Number of labeled connected 4-chromatic (i.e., chromatic number = 4) graphs on n nodes.

2

0, 0, 0, 1, 60, 4652

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..6.

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

CROSSREFS

Cf. A001832, A084273.

Sequence in context: A166772 A293091 A074076 * A289307 A091032 A328951

Adjacent sequences: A084271 A084272 A084273 * A084275 A084276 A084277

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, May 24 2003

STATUS

approved