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Search: id:A034858
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A034858 C(n+3,4)+3*C(n+1,3)+5*C(n-1,2)+7*n-15. +0
1
7, 38, 93, 180, 308, 487, 728, 1043, 1445, 1948, 2567, 3318, 4218, 5285, 6538, 7997, 9683, 11618, 13825, 16328, 19152, 22323, 25868, 29815, 34193, 39032, 44363, 50218, 56630, 63633, 71262, 79553 (list; graph; listen)
OFFSET

2,1

REFERENCES

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

CROSSREFS

Sequence in context: A129736 A003352 A165495 this_sequence A114290 A000531 A099453

Adjacent sequences: A034855 A034856 A034857 this_sequence A034859 A034860 A034861

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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