A076328 Number of connected 9-colorable (i.e., chromatic number <= 9) simple graphs on n nodes.

1, 1, 2, 6, 21, 112, 853, 11117, 261080, 11716570, 1006700555

Offset: 1

Author

Eric W. Weisstein, Oct 06 2002

Keywords

• nonn
• more

Links

• Eric Weisstein's World of Mathematics, n-Colorable Graph

Crossrefs

Cf. A005142, A076322, A076323, A076324, A076325, A076326, A076327.

Cf. A205568, A076321, A084269.

Cf. A001349. [R. J. Mathar, Sep 21 2008]

Formula

Inverse Euler transform of A076321. - Andrew Howroyd, Dec 02 2018

Extensions

a(10)-a(11) from Andrew Howroyd, Dec 02 2018