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Search: id:A000306
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A000306 Number of trees of diameter 8.
(Formerly M3552 N1440) 		+0
1
1, 4, 19, 66, 219, 645, 1813, 4802, 12265, 30198, 72396, 169231, 387707, 871989, 1930868, 4215615, 9091410, 19389327, 40944999, 85691893, 177898521 (list; graph; listen)
OFFSET

9,2
REFERENCES

J. Riordan, Enumeration of trees by height and diameter, IBM J. Res. Dev. 4 (1960), 473-478.

LINKS

Index entries for sequences related to trees

CROSSREFS

Sequence in context: A134507 A098813 A055485 this_sequence A100185 A129019 A027208

Adjacent sequences: A000303 A000304 A000305 this_sequence A000307 A000308 A000309

KEYWORD

nonn

AUTHOR

njas

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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