A126734 Number of connected graphs on n nodes with edge chromatic number 4.

0, 0, 0, 0, 10, 48, 279, 1715, 11464, 87114

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 A126732.

Sequence in context: A084857 A349948 A330170 * A264266 A048698 A045770

Adjacent sequences: A126731 A126732 A126733 * A126735 A126736 A126737

Keyword

nonn

Author

N. J. A. Sloane, Feb 16 2007

Status

approved