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A160798 as a simple table

na(n)
11
27
31
47
53
621
71
87
93
1021
113
1221
139
1463
151
167
173
1821
193
2021
219
2263
233
2421
259
2663
279
2863
2927
30189
311
327
333
3421
353
3621
379
3863
393
4021
419
4263
439
4463
4527
46189
473
4821
499
5063
519
5263
5327
54189
559
5663
5727
58189
5927
60189
6181
62567
631
647
653
6621
673
6821
699
7063
713
7221
739
7463

[1,7,1,7,3,21,1,7,3,21,3,21,9,63,1,7,3,21,3,21,9,
 63,3,21,9,63,9,63,27,189,1,7,3,21,3,21,9,63,3,21,
 9,63,9,63,27,189,3,21,9,63,9,63,27,189,9,63,27,
 189,27,189,81,567,1,7,3,21,3,21,9,63,3,21,9,63]