A055311 - OEIS

A055311

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

11, 135036, 148478616, 60841500720, 14441439612600, 2425616445732480, 321683306528263680, 36020400612748231680, 3559225274902019923200, 320000251320623922048000, 26762519467151924853196800

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OFFSET

11,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 11..200

Index entries for sequences related to rooted trees

FORMULA

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

MATHEMATICA

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 *)

PROG

(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

CROSSREFS

Column 10 of A055302.

Sequence in context: A079558 A111478 A300196 * A116622 A013794 A022009

Adjacent sequences: A055308 A055309 A055310 * A055312 A055313 A055314

KEYWORD

nonn

AUTHOR

Christian G. Bower, May 11 2000

STATUS

approved