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A147343 as a simple table

na(n)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
153
163
179
189
1919
2019
2139
2239
23125
24125
25481
26481

[1,1,1,1,1,1,1,1,1,1,1,1,1,1,3,3,9,9,19,19,39,39,
 125,125,481,481]