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A209962 as a simple table

na(n)
10
20
39
4162
51845
617262
7144945
81138194
98548029
1062230230
11442977705
123101305338
1321442016565
14146833223166
15998073454689
166745063632354
1745376569607725
18304167049525926
192033050559738265
2013557845469637962

[0,0,9,162,1845,17262,144945,1138194,8548029,
 62230230,442977705,3101305338,21442016565,
 146833223166,998073454689,6745063632354,
 45376569607725,304167049525926,2033050559738265,
 13557845469637962]