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A055355
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Number of labeled mobiles (circular rooted trees) with n nodes and 8 leaves.
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2
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45360, 9862560, 1160973000, 99904860000, 7103580541200, 445556635524000, 25652184715357200, 1391455702596960000, 72404516222438400000, 3661224054771419136000, 181631020686490222848000
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OFFSET
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9,1
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LINKS
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MATHEMATICA
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m = 20; L[x_] = Log[1 - x] + O[x]^m // Normal; A[_] = 0;
Do[A[x_] = x y - x L[A[x]] + O[x]^k // Normal // Expand, {k, m}];
Drop[(SeriesCoefficient[#, {y, 0, 8}] & /@ CoefficientList[A[x], x]) * Range[0, m - 1]!, 9] (* Jean-François Alcover, Nov 01 2019 *)
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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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