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A091117 as a simple table

na(n)
12
27
347
4309
52412
619622
7166212
81440496
912712315
10113764040
111029518338
129401997001

[2,7,47,309,2412,19622,166212,1440496,12712315,
 113764040,1029518338,9401997001]