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A147125 as a simple table

na(n)
11
21
31
41
51
61
71
81
99
109
1133
1233
13105
14105
15641
16641
178787
188787
19211111
20211111
214653287

[1,1,1,1,1,1,1,1,9,9,33,33,105,105,641,641,8787,
 8787,211111,211111,4653287]