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A084280
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Number of labeled 4-colorable (i.e. chromatic number <= 4) graphs on n nodes.
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3
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OFFSET
| 1,2
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LINKS
| S. R. Finch, Bipartite, k-colorable and k-colored graphs
Eric Weisstein's World of Mathematics, n-Colorable Graph
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CROSSREFS
| Cf. A047864, A084279, A084281, A084282.
Sequence in context: A153571 A086789 A066537 * A153534 A153563 A178169
Adjacent sequences: A084277 A084278 A084279 * A084281 A084282 A084283
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KEYWORD
| nonn,more
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com), May 25, 2003
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