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A014270 Number of trees on n nodes with forbidden limbs. 0

%I #14 Feb 27 2016 02:45:20

%S 0,1,1,1,2,3,6,10,21,45,100,223,522,1234,2997,7344,18325,46098,117340,

%T 300935,778249,2025542,5305684,13972364,36985033,98344160,262612283,

%U 703971120,1893895747,5112056798,13841346542,37584596256,102331837104,279322502700,764238954757,2095651789775,5758646716947,15855576055018,43737831483597

%N Number of trees on n nodes with forbidden limbs.

%H T. Lu, <a href="http://dx.doi.org/10.1016/0012-365X(95)00041-T">The enumeration of trees with and without given limbs</a>, Discr. Math., 154 (1996), 153-165, Example 3.

%H <a href="/index/Tra#trees">Index entries for sequences related to trees</a>

%F G.f. x^9+x^11 +g014267(x) -( g014267(x)^2 -g014267(x^2) )/2, where g014267 is the generating function of A014267. - _R. J. Mathar_, Feb 26 2016

%K nonn

%O 0,5

%A _N. J. A. Sloane_.

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Last modified April 25 05:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)