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A084268 Triangle of counts of simple graphs on n nodes having chromatic number 1, ..., n. +0
2
1, 1, 1, 1, 2, 1, 1, 6, 3, 1, 1, 12, 16, 4, 1, 1, 34, 84, 31, 5, 1, 1, 87, 579, 318, 52, 6, 1, 1, 302, 5721, 5366, 867, 81, 7, 1 (list; table; graph; listen)
OFFSET

0,5

LINKS

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

EXAMPLE

1; 1, 1; 1, 2, 1; 1, 6, 3, 1; ...

CROSSREFS

Cf. A076278, A076279, A076280, A076281, A076282, A076283, A084269.

Sequence in context: A085826 A112477 A156984 this_sequence A120258 A144351 A142589

Adjacent sequences: A084265 A084266 A084267 this_sequence A084269 A084270 A084271

KEYWORD

nonn,more,tabl

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), May 24, 2003

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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