A076282 Number of 6-chromatic (i.e., chromatic number equals 6) simple graphs on n nodes.

0, 0, 0, 0, 0, 1, 6, 81, 2028, 115391, 14662562

Offset

1,7

Links

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

Keith M. Briggs, Combinatorial Graph Theory

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

Crossrefs

Column k=6 of A084268.

Cf. A076278, A076279, A076280, A076281.

Sequence in context: A252821 A371765 A204264 * A121790 A279203 A320993

Adjacent sequences: A076279 A076280 A076281 * A076283 A076284 A076285

Keyword

nonn,more

Author

Eric W. Weisstein, Oct 06 2002

Extensions

a(10) from Keith Briggs, Mar 14 2006

a(11) from Michael Sollami, Jan 28 2012

Status

approved