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Search: id:A000550
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| A000550 |
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Number of trees of diameter 7.
(Formerly M2969 N1201)
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+0
1
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| 1, 3, 14, 42, 128, 334, 850, 2010, 4625, 10201, 21990, 46108, 94912, 191562, 380933, 746338, 1444676, 2763931, 5235309, 9822686, 18275648, 33734658, 61826344
(list; graph; listen)
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OFFSET
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8,2
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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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Index entries for sequences related to trees
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CROSSREFS
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Sequence in context: A117662 A104905 A055650 this_sequence A124650 A063903 A115005
Adjacent sequences: A000547 A000548 A000549 this_sequence A000551 A000552 A000553
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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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