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A055311 Number of labeled rooted trees with n nodes and 10 leaves. 1

%I #14 Sep 08 2022 08:45:01

%S 11,135036,148478616,60841500720,14441439612600,2425616445732480,

%T 321683306528263680,36020400612748231680,3559225274902019923200,

%U 320000251320623922048000,26762519467151924853196800

%N Number of labeled rooted trees with n nodes and 10 leaves.

%H Vincenzo Librandi, <a href="/A055311/b055311.txt">Table of n, a(n) for n = 11..200</a>

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

%F a(n) = n! * (n-10)^2*(n-9)^2*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(15*n^6 - 735*n^5 + 14715*n^4 - 153617*n^3 + 878862*n^2 - 2601592*n + 3096576)/10113169489920000. - _Vaclav Kotesovec_, Jul 25 2014

%t Table[n! * (n-10)^2*(n-9)^2*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(15*n^6 - 735*n^5 + 14715*n^4 - 153617*n^3 + 878862*n^2 - 2601592*n + 3096576)/10113169489920000,{n,11,20}] (* _Vaclav Kotesovec_, Jul 25 2014 *)

%o (Magma) [Factorial(n)*(n-10)^2*(n-9)^2*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(15*n^6 - 735*n^5 + 14715*n^4 - 153617*n^3 + 878862*n^2 - 2601592*n + 3096576) / 10113169489920000: n in [11..25]]; // _Vincenzo Librandi_, Jul 25 2014

%Y Column 10 of A055302.

%K nonn

%O 11,1

%A _Christian G. Bower_, May 11 2000

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Last modified April 16 08:27 EDT 2024. Contains 371698 sequences. (Running on oeis4.)