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A076279 Number of 3-chromatic (i.e. chromatic number equals 3) simple graphs on n nodes. +0
8
0, 0, 1, 3, 16, 84, 579, 5721, 87381, 2104349 (list; graph; listen)
OFFSET

1,4

LINKS

Keith M. Briggs, Combinatorial Graph Theory

Eric Weisstein's World of Mathematics, n-Chromatic Graph

CROSSREFS

Cf. A076278, A076280, A076281, A076282, A115597.

Sequence in context: A026160 A025187 A151328 this_sequence A056369 A056360 A163604

Adjacent sequences: A076276 A076277 A076278 this_sequence A076280 A076281 A076282

KEYWORD

nonn,more

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Oct 06, 2002

EXTENSIONS

a(10) from Keith Briggs, Mar 14 2006.

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.


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