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Search: id:A126728
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A126728 Number of graphs on n nodes with chromatic number 2. +0
2
0, 0, 1, 3, 5, 10, 15, 26, 37, 58 (list; graph; listen)
OFFSET

1,4
LINKS

Keith M. Briggs, Combinatorial Graph Theory

CROSSREFS

A diagonal of triangle in A123962.

Adjacent sequences: A126725 A126726 A126727 this_sequence A126729 A126730 A126731

Sequence in context: A024452 A074968 A090491 this_sequence A070557 A132302 A097513

KEYWORD

nonn

AUTHOR

njas, Feb 16 2007

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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