A076320 Number of 8-colorable (i.e., chromatic number <= 8) simple graphs on n nodes.

1, 2, 4, 11, 34, 156, 1044, 12346, 274667, 12005158, 1018997631

Offset

1,2

Links

Table of n, a(n) for n=1..11.

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

Formula

a(n) = A076319(n) + A205567(n). - Andrew Howroyd, Dec 02 2018

Crossrefs

Cf. A033995, A076315, A076316, A076317, A076318, A076319, A076321, A205567.

Sequence in context: A046750 A076319 A178944 * A076321 A000088 A071794

Adjacent sequences: A076317 A076318 A076319 * A076321 A076322 A076323

Keyword

nonn,more

Author

Eric W. Weisstein, Oct 06 2002

Extensions

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

Status

approved