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A084271
Number of labeled 3-chromatic (i.e., chromatic number = 3) graphs on n nodes.
2
0, 0, 1, 22, 582, 22377, 1353810, 134222308, 22133512793, 6025984082738, 2662612877308658, 1876486379430019037
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
Table of n, a(n) for n=1..12.
Eric Weisstein's World of Mathematics, n-Chromatic Graph
FORMULA
a(n) = A084279(n) - A047864(n). - Andrew Howroyd, Dec 02 2018
CROSSREFS
Cf. A047864, A084270, A084272, A084279.
Sequence in context: A240369 A159875 A240337 * A092086 A373723 A369142
Adjacent sequences: A084268 A084269 A084270 * A084272 A084273 A084274
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, May 24 2003
EXTENSIONS
a(7)-a(12) from Andrew Howroyd, Dec 02 2018
STATUS
approved

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Last modified September 28 08:28 EDT 2024. Contains 376288 sequences.
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