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A126731 Number of graphs on n nodes with edge chromatic number 5. 1
0, 0, 0, 0, 2, 38, 392, 4895, 68696, 1140623 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..10.

Keith M. Briggs, Combinatorial Graph Theory

CROSSREFS

A diagonal of triangle in A123962.

Sequence in context: A217214 A303618 A179503 * A216357 A046845 A098772

Adjacent sequences:  A126728 A126729 A126730 * A126732 A126733 A126734

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 16 2007

STATUS

approved

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Last modified November 29 15:46 EST 2021. Contains 349416 sequences. (Running on oeis4.)