A126739 Number of connected graphs on n nodes with chromatic number 5.

0, 0, 0, 0, 1, 4, 46, 809, 27794, 1890221, 248580644

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

Author

N. J. A. Sloane, Feb 16 2007

Extensions

a(11) from Michael Sollami, Jan 29 2012

Status

approved