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A069610 as a simple table

na(n)
18
23
39
411
57
621
723
83
97
1029
113
1299
139
1493
151
1639
1733
1821
19137
20123
2157
2213
23191
243
25163
269
27143
2863
2921
30157
31521
32163
33161
3443
35161
36109
37107
38121
39423
4057
4171
427
43173
44469
45107
4657
47177
48411
4949
50149
5161
52291
53413
54271
55299
56693
57349
58149
5973
60299
61271
62521

[8,3,9,11,7,21,23,3,7,29,3,99,9,93,1,39,33,21,137,
 123,57,13,191,3,163,9,143,63,21,157,521,163,161,
 43,161,109,107,121,423,57,71,7,173,469,107,57,177,
 411,49,149,61,291,413,271,299,693,349,149,73,299,
 271,521]