A126740 - OEIS

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A126740

Number of connected graphs on n nodes with chromatic number 6.

2

0, 0, 0, 0, 0, 1, 5, 74, 1940, 113272, 14545025

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,7

LINKS

Table of n, a(n) for n=1..11.

Keith M. Briggs, Combinatorial Graph Theory

CROSSREFS

A diagonal of triangle in A126736.

Sequence in context: A065894 A233013 A370463 * A251666 A192564 A374980

Adjacent sequences: A126737 A126738 A126739 * A126741 A126742 A126743

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 16 2007

EXTENSIONS

a(11) from Michael Sollami, Jan 29 2012

STATUS

approved