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A076315
Number of 3-colorable (i.e., chromatic number <= 3) simple graphs on n nodes.
10
1, 2, 4, 10, 29, 119, 667, 6024, 88500, 2109828, 78347534, 4383817811, 362181166439
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, n-Colorable Graph
FORMULA
a(n) = A033995(n) + A076279(n). - Andrew Howroyd, Dec 02 2018
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Oct 06 2002
EXTENSIONS
a(10)-a(11) from Andrew Howroyd, Dec 02 2018
a(12) from Brendan McKay, Jan 19 2020
a(13) from Brendan McKay, Nov 08 2022
STATUS
approved