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A000342
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Number of n-node rooted trees of height 5.
(Formerly M3884 N1594)
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2
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0, 0, 0, 0, 0, 1, 5, 19, 61, 180, 498, 1323, 3405, 8557, 21103, 51248, 122898, 291579, 685562, 1599209, 3705122, 8532309, 19543867, 44552066, 101124867, 228640542, 515125815, 1156829459, 2590247002, 5784031485, 12883390590, 28629914457
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,7
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REFERENCES
| J. Riordan, Enumeration of trees by height and diameter, IBM J. Res. Dev. 4 (1960), 473-478.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| 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
| A001385-A001384. (Christian G. Bower (bowerc(AT)usa.net)).
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MAPLE
| For Maple program see link in A000235.
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CROSSREFS
| Sequence in context: A102841 A036637 A036644 * A189427 A072111 A173627
Adjacent sequences: A000339 A000340 A000341 * A000343 A000344 A000345
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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