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A076280
Number of 4-chromatic (i.e., chromatic number equals 4) simple graphs on n nodes.
10
0, 0, 0, 1, 4, 31, 318, 5366, 155291, 7855628, 675054876
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
Table of n, a(n) for n=1..11.
Keith M. Briggs, Combinatorial Graph Theory
Eric Weisstein's World of Mathematics, n-Chromatic Graph
CROSSREFS
Column k=4 of A084268.
Cf. A076278, A076279, A076281, A076282.
Sequence in context: A243312 A349739 A359621 * A141005 A122400 A107725
Adjacent sequences: A076277 A076278 A076279 * A076281 A076282 A076283
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Oct 06 2002
EXTENSIONS
a(10) from Keith Briggs, Feb 24 2006
a(11) from Michael Sollami, Jan 28 2012
STATUS
approved

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Last modified November 29 00:00 EST 2024. Contains 378208 sequences.
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