A241702 Number of connected graphs on n nodes with chromatic number 7.

0, 0, 0, 0, 0, 0, 1, 6, 110, 4125, 389583

Offset: 1

Author

Travis Hoppe and Anna Petrone, Apr 27 2014

Keywords

• nonn
• hard
• more

Comments

A diagonal of triangle in A126736.

Links

• Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs
• T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644 [math.CO], 2014.
• F. Hüffner, tinygraph, software for generating integer sequences based on graph properties.
• Eric Weisstein's World of Mathematics, Chromatic Number

Extensions

a(11) added using tinygraph by Falk Hüffner, Apr 04 2017