A055354 Number of labeled mobiles (circular rooted trees) with n nodes and 7 leaves.

5760, 940896, 85049280, 5731545600, 324745027200, 16481262283200, 778208622871680, 35036455255401600, 1529404526377728000, 65498410076875776000, 2775672164602681344000, 117137057625636739891200

Offset: 8

Author

Christian G. Bower, May 15 2000

Keywords

• nonn

Links

• Georg Fischer, Table of n, a(n) for n = 8..250
• Index entries for sequences related to mobiles

Crossrefs

Column 7 of A055349.

Programs

Mathematica

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, 7}] & /@ CoefficientList[A[x], x]) * Range[0, m - 1]!, 8] (* Jean-François Alcover, Nov 01 2019 *)