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A034859 C(n+3,4)+3*C(n+1,3)+5*C(n-1,2)+7*n-15, n >= 2. 0
1, 10, 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; refs; listen; history; internal format)
OFFSET

1,2

REFERENCES

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

CROSSREFS

Sequence in context: A065009 A031430 A154517 * A197060 A136840 A027982

Adjacent sequences:  A034856 A034857 A034858 * A034860 A034861 A034862

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.