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A161942 as a simple table

na(n)
11
23
31
47
53
63
71
815
913
109
113
127
137
143
153
1631
179
1839
195
2021
211
229
233
2415
2531
2621
275
287
2915
309
311
3263
333
3427
353
3691
3719
3815
397
4045
4121
423
4311
4421
4539
469
473
4831
4957
5093
519
5249
5327
5415
559
5615
575
5845
5915
6021
6131
623
6313
64127
6521
669
6717
6863
693
709
719
72195
7337
7457
7531
7635
773
7821
795
8093
81121
8263

[1,3,1,7,3,3,1,15,13,9,3,7,7,3,3,31,9,39,5,21,1,9,
 3,15,31,21,5,7,15,9,1,63,3,27,3,91,19,15,7,45,21,
 3,11,21,39,9,3,31,57,93,9,49,27,15,9,15,5,45,15,
 21,31,3,13,127,21,9,17,63,3,9,9,195,37,57,31,35,3,
 21,5,93,121,63]