A084273 Number of labeled connected 3-chromatic (i.e., chromatic number = 3) graphs on n nodes.

0, 0, 1, 18, 472, 18855

Offset

1,4

Links

Table of n, a(n) for n=1..6.

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

Crossrefs

Cf. A001832, A084274.

Sequence in context: A086501 A204241 A053115 * A230587 A281161 A027405

Adjacent sequences: A084270 A084271 A084272 * A084274 A084275 A084276

Keyword

nonn,more

Author

Eric W. Weisstein, May 24 2003

Status

approved