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A084283
Number of connected labeled 3-colorable (i.e., chromatic number <= 3) graphs on n nodes.
4
1, 1, 4, 37, 667, 21886, 1262719, 125387767, 21009091072, 5809425721381, 2596693747042999, 1844571022305443422
OFFSET
1,3
LINKS
Eric Weisstein's World of Mathematics, n-Colorable Graph
FORMULA
Logarithmic transform of A084279. - Andrew Howroyd, Dec 02 2018
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, May 25 2003
EXTENSIONS
a(7)-a(12) from Andrew Howroyd, Dec 02 2018
STATUS
approved