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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
OFFSET
1,5
LINKS
Eric Weisstein's World of Mathematics, n-Chromatic Graph
CROSSREFS
Sequence in context: A166772 A293091 A074076 * A289307 A091032 A328951
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, May 24 2003
STATUS
approved