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A221328 as a simple table

na(n)
11
23
31
47
517
61
717
8119
999
101
1141
12866
132008
14577
151
1699
176328
1846105
1933873
203363
211
22239
2346211
241010078
252460824
26571358
2719601
281
29577
30337274
3122181855
32162430981
33131347807
349637322
35114243
361
371393
382460918
39487335857
4010794156688

[1,3,1,7,17,1,17,119,99,1,41,866,2008,577,1,99,
 6328,46105,33873,3363,1,239,46211,1010078,2460824,
 571358,19601,1,577,337274,22181855,162430981,
 131347807,9637322,114243,1,1393,2460918,487335857,
 10794156688]