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A005199
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Average forests of planted trees.
(Formerly M3285)
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0
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0, 1, 1, 4, 6, 18, 35, 93, 214, 549, 1362, 3534, 9102, 23951, 63192, 168561, 451764, 1219290, 3305783, 9008027, 24643538, 67681372, 186504925, 515566016, 1429246490
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| E. M. Palmer and A. J. Schwenk, On the number of trees in a random forest, J. Combin. Theory, B 27 (1979), 109-121.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Sequence in context: A182643 A156096 A088810 * A107390 A051253 A175955
Adjacent sequences: A005196 A005197 A005198 * A005200 A005201 A005202
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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