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A055310
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Number of labeled rooted trees with n nodes and 9 leaves.
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1
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10, 56210, 37621320, 10493357160, 1803842280240, 228599313742800, 23567044281580800, 2099312576058297600, 168119161594140556800, 12440787291129176179200, 867641306901247726848000
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OFFSET
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10,1
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LINKS
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FORMULA
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a(n) = n! * (n-9)*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(135*n^7 - 7245*n^6 + 164745*n^5 - 2054535*n^4 + 15148840*n^3 - 65892420*n^2 + 156108464*n - 154828800)/505658474496000. - Vaclav Kotesovec, Jul 25 2014
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MATHEMATICA
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Table[n! * (n-9)*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(135*n^7 - 7245*n^6 + 164745*n^5 - 2054535*n^4 + 15148840*n^3 - 65892420*n^2 + 156108464*n - 154828800)/505658474496000, {n, 10, 20}] (* Vaclav Kotesovec, Jul 25 2014 *)
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PROG
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(Magma) [Factorial(n)*(n-9)*(n-8)*(n-7)*(n-6)*(n-5)*(n-4)*(n-3)*(n-2)*(n-1)*(135*n^7 - 7245*n^6 + 164745*n^5 - 2054535*n^4 + 15148840*n^3 - 65892420*n^2 + 156108464*n - 154828800)/505658474496000: n in [10..25]]; // Vincenzo Librandi, Jul 25 2014
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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