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A007134
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Number of connected labeled chordal graphs (or triangulated graphs) with n nodes.
(Formerly M3659)
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4
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1, 1, 4, 35, 541, 13302, 489287, 25864897, 1910753782, 193328835393, 26404671468121, 4818917841228328, 1167442027829857677
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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REFERENCES
| N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. C. Wormald, Counting labeled chordal graphs. Graphs Combin. 1 (1985), no. 2, 193-200.
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CROSSREFS
| Cf. A058862.
Sequence in context: A177387 A165933 A005973 * A125798 A129581 A120055
Adjacent sequences: A007131 A007132 A007133 * A007135 A007136 A007137
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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