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Search: id:A005198
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| A005198 |
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Number of forests of planted trees.
(Formerly M2491)
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+0
1
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| 0, 1, 1, 3, 5, 13, 27, 68, 160, 404, 1010, 2604, 6726, 17661, 46628, 124287, 333162, 898921, 2437254, 6640537, 18166568, 49890419, 137478389, 380031868
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
E. M. Palmer and A. J. Schwenk, On the number of trees in a random forest, J. Combin. Theory, B 27 (1979), 109-121.
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CROSSREFS
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Sequence in context: A000631 A026569 A035082 this_sequence A160823 A077443 A147196
Adjacent sequences: A005195 A005196 A005197 this_sequence A005199 A005200 A005201
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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