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A038092 Number of n-node rooted identity trees of height 8. 3
1, 7, 27, 82, 221, 553, 1323, 3078, 7019, 15765, 34992, 76922, 167697, 363020, 780937, 1670786, 3557060, 7539856, 15918972, 33490067, 70226358, 146822144, 306121101, 636648253, 1320964417, 2734901341, 5650875038, 11653922283, 23991828701, 49310264440 (list; graph; refs; listen; history; text; internal format)
OFFSET

9,2

COMMENTS

The number of terms with a(n)>0 is A038093(8) - 8. - Alois P. Heinz, Sep 22 2013

LINKS

Alois P. Heinz, Table of n, a(n) for n = 9..1000

Index entries for sequences related to rooted trees

FORMULA

A038087-A038086.

MATHEMATICA

f[n_]:=Nest[CoefficientList[Series[Product[(1+x^i)^#[[i]], {i, 1, Length[#]}], {x, 0, 50}], x]&, {1}, n]; Drop[f[8]-PadRight[f[7], Length[f[8]]], 8] (* Geoffrey Critzer, Aug 01 2013 *)

CROSSREFS

Cf. A038081-A038093.

Column k=8 of A227819.

Sequence in context: A266761 A027180 A036597 * A059823 A059769 A135914

Adjacent sequences:  A038089 A038090 A038091 * A038093 A038094 A038095

KEYWORD

nonn,fini

AUTHOR

Christian G. Bower, Jan 04 1999

STATUS

approved

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Last modified November 15 09:03 EST 2019. Contains 329144 sequences. (Running on oeis4.)