

A084286


Number of connected labeled 6colorable (i.e., chromatic number <= 6) graphs on n nodes.


3



1, 1, 4, 38, 728, 26704, 1866255, 251547611, 66295198837, 34494681184926, 35636712584655663
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,3


LINKS

Table of n, a(n) for n=1..11.
Eric Weisstein's World of Mathematics, nColorable Graph


FORMULA

Logarithmic transform of A084282.  Andrew Howroyd, Dec 02 2018


CROSSREFS

Cf. A001832, A084282, A084283, A084284, A084285.
Sequence in context: A096332 A084284 A084285 * A001187 A093377 A178017
Adjacent sequences: A084283 A084284 A084285 * A084287 A084288 A084289


KEYWORD

nonn,more


AUTHOR

Eric W. Weisstein, May 25 2003


EXTENSIONS

a(7)a(11) from Andrew Howroyd, Dec 02 2018


STATUS

approved



