A126740 Number of connected graphs on n nodes with chromatic number 6.

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

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 A080473

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