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Search: id:A000418
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| A000418 |
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Number of n-node rooted trees of height 7.
(Formerly M4408 N1862)
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+0
1
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| 0, 0, 0, 0, 0, 0, 0, 1, 7, 34, 136, 487, 1615, 5079, 15349, 45009, 128899, 362266, 1002681, 2740448, 7411408, 19865445, 52840977, 139624510, 366803313, 958696860, 2494322662, 6463281890, 16686206047, 42935345688, 110142163940, 281763465941
(list; graph; listen)
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OFFSET
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1,9
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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).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
J. Riordan, Enumeration of trees by height and diameter, IBM J. Res. Dev. 4 (1960), 473-478.
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LINKS
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N. J. A. Sloane, Table of n, a(n) for n=1..200
Index entries for sequences related to rooted trees
Index entries for sequences related to trees
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FORMULA
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A034824-A034823. (Christian G. Bower (bowerc(AT)usa.net)).
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MAPLE
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For Maple program see link in A000235.
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CROSSREFS
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Sequence in context: A036632 A036639 A036646 this_sequence A055852 A122611 A014915
Adjacent sequences: A000415 A000416 A000417 this_sequence A000419 A000420 A000421
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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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