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A146185 as a simple table

na(n)
11
21
31
41
51
61
71
81
91
101
115
125
1317
1417
1543
1643
17197
18197
191293
201293
2111263
2211263
23110807
24110807
251310257

[1,1,1,1,1,1,1,1,1,1,5,5,17,17,43,43,197,197,1293,
 1293,11263,11263,110807,110807,1310257]