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A005196 Number of random forests.
(Formerly M2567)
+0
3
1, 3, 6, 13, 24, 49, 93, 190, 381, 803, 1703, 3755, 8401, 19338, 45275, 108229, 262604, 647083, 1613941, 4072198, 10374138, 26663390, 69056163, 180098668, 472604314, 1247159936, 3307845730, 8814122981, 23585720703, 63359160443, 170815541708 (list; graph; listen)
OFFSET

1,2

REFERENCES

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.

LINKS

Eric Weisstein's World of Mathematics, Forest

CROSSREFS

Sequence in context: A005405 A000219 A027999 this_sequence A032287 A006017 A147323

Adjacent sequences: A005193 A005194 A005195 this_sequence A005197 A005198 A005199

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 03 2004

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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