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A014266 Number of trees on n nodes with forbidden limbs. 0
0, 1, 1, 1, 2, 2, 4, 7, 16, 30, 68, 146, 340, 786, 1878, 4507, 11045, 27220, 67956, 170766, 432818, 1103539, 2831814, 7303966, 18934866, 49302321, 128910528, 338329555, 891099316, 2354613762, 6240696052, 16587146598, 44203851675, 118093003229 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Differs from A014265 only at a(8). - R. J. Mathar, Feb 27 2016

LINKS

Table of n, a(n) for n=0..33.

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

Index entries for sequences related to trees

FORMULA

G.f.: x^8 + b(x) where b(x) is the o.g.f. of A014265. - Sean A. Irvine, Oct 18 2018

CROSSREFS

Cf. A014265.

Sequence in context: A014265 A153967 A052949 * A032441 A238184 A065844

Adjacent sequences:  A014263 A014264 A014265 * A014267 A014268 A014269

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Oct 17 2018

STATUS

approved

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Last modified August 18 15:00 EDT 2019. Contains 326106 sequences. (Running on oeis4.)