A055296 Number of trees with n nodes and 9 leaves.
1, 4, 20, 83, 318, 1095, 3495, 10292, 28389, 73586, 180663, 421949, 942537, 2021060, 4176507, 8342823, 16157071, 30410396, 55755744, 99773709, 174579270, 299163528, 502804996, 829905792, 1346834873, 2151396469
Offset: 10
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Column 9 of A055290.