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A165611 as a simple table

na(n)
10
20
3648
47128
585536
6870750
78937054
889606088
9899190558
108995054860
1189990100090
12899940633714
138999883000108
1489999307063540
15899998650010008
168999992080398088
1789999984700000144
18899999910900869040
198999999829000000162
2089999999010004961988

[0,0,648,7128,85536,870750,8937054,89606088,
 899190558,8995054860,89990100090,899940633714,
 8999883000108,89999307063540,899998650010008,
 8999992080398088,89999984700000144,
 899999910900869040,8999999829000000162,
 89999999010004961988]