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A076279
Number of 3-chromatic (i.e., chromatic number equals 3) simple graphs on n nodes.
11
0, 0, 1, 3, 16, 84, 579, 5721, 87381, 2104349, 78315231, 4383566676, 362178638727
OFFSET
1,4
LINKS
Eric Weisstein's World of Mathematics, n-Chromatic Graph
CROSSREFS
Column k=3 of A084268.
Sequence in context: A373277 A151328 A277923 * A056369 A056360 A278681
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Oct 06 2002
EXTENSIONS
a(10) from Keith Briggs, Mar 14 2006
a(11) from Michael Sollami, Jan 28 2012
a(12)-a(13) from Brendan McKay, Nov 08 2022
STATUS
approved