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A146415 as a simple table

na(n)
11
21
31
41
51
61
71
81
918
109
11192
1229
131571
14137
1516589
161117
17263101
1813601
197736259
20257342
21336101213
226436423
2319847949792
24229848194

[1,1,1,1,1,1,1,1,18,9,192,29,1571,137,16589,1117,
 263101,13601,7736259,257342,336101213,6436423,
 19847949792,229848194]