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A076325 Number of connected 6-colorable (i.e., chromatic number <= 6) simple graphs on n nodes. 7
1, 1, 2, 6, 21, 112, 852, 11110, 260962, 11712281, 1006302720 (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, n-Colorable Graph
FORMULA
Inverse Euler transform of A076318. - Andrew Howroyd, Dec 02 2018
CROSSREFS
Cf. A005142, A076322, A076323, A076324, A076326, A076327, A076328.
Cf. A076282, A076318, A084269, A126740.
Sequence in context: A245880 A076324 A303032 * A128526 A076326 A076327
Adjacent sequences: A076322 A076323 A076324 * A076326 A076327 A076328
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Oct 06 2002
EXTENSIONS
a(10)-a(11) from Andrew Howroyd, Dec 02 2018
STATUS
approved

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Last modified May 13 05:21 EDT 2024. Contains 372498 sequences. (Running on oeis4.)