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A014274 Number of trees on n nodes with forbidden limbs. 0
0, 1, 1, 1, 5, 15, 50, 180, 676, 2666, 10831, 45263, 193097, 839305, 3702793, 16552491, 74829186, 341652547, 1573557441, 7303953109, 34139363401, 160575404720, 759577584604, 3611720900930, 17254901764792, 82793934434748, 398862862215977, 1928661772504001, 9357906461877107, 45549820100444687 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..29.

T. Lu, The enumeration of trees with and without given limbs, Discr. Math., 154 (1996), 153-165, Example 4.

Index entries for sequences related to trees

FORMULA

G.f. g014273(x)-g014273(x)^2, where g014273 is the o.g.f. of A014273. - R. J. Mathar, Feb 27 2016

CROSSREFS

Sequence in context: A152809 A034539 A029609 * A120825 A199985 A255442

Adjacent sequences:  A014271 A014272 A014273 * A014275 A014276 A014277

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 22 08:33 EST 2019. Contains 329389 sequences. (Running on oeis4.)