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A147171 as a simple table

na(n)
11
21
31
41
51
61
71
81
9193
10369
112595
126071
1368113
14166829
153392025
1610054713
171656174053
186422563367
191047960128407
204842120420549
21791850842457727

[1,1,1,1,1,1,1,1,193,369,2595,6071,68113,166829,
 3392025,10054713,1656174053,6422563367,
 1047960128407,4842120420549,791850842457727]