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A000299
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Number of n-node rooted trees of height 4.
(Formerly M3461 N1408)
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2
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0, 0, 0, 0, 1, 4, 13, 36, 93, 225, 528, 1198, 2666, 5815, 12517, 26587, 55933, 116564, 241151, 495417, 1011950, 2055892, 4157514, 8371318, 16792066, 33564256, 66875221, 132849983, 263192599, 520087551, 1025295487, 2016745784, 3958608430
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,6
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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
| A001384-A001383. (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: A053563 A036636 A036643 * A102301 A206603 A031506
Adjacent sequences: A000296 A000297 A000298 * A000300 A000301 A000302
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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