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A076323
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Number of connected 4-colorable (i.e. chromatic number <= 4) simple graphs on n nodes.
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6
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OFFSET
| 1,3
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LINKS
| Eric Weisstein's World of Mathematics, n-Colorable Graph
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CROSSREFS
| Cf. A005142, A076322, A076324, A076325, A076326, A076327, A076328.
Sequence in context: A079455 A052433 A078566 * A136795 A074115 A013206
Adjacent sequences: A076320 A076321 A076322 * A076324 A076325 A076326
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KEYWORD
| nonn,more
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com), Oct 06, 2002
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