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A126739 Number of connected graphs on n nodes with chromatic number 5. 2
0, 0, 0, 0, 1, 4, 46, 809, 27794, 1890221, 248580644 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

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: A264717 A318109 A234527 * A191870 A099023 A000657

Adjacent sequences:  A126736 A126737 A126738 * A126740 A126741 A126742

KEYWORD

nonn,changed

AUTHOR

N. J. A. Sloane, Feb 16 2007

EXTENSIONS

a(11) from Michael Sollami, Jan 29 2012

STATUS

approved

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Last modified August 22 05:35 EDT 2019. Contains 326172 sequences. (Running on oeis4.)