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A143175 as a simple table

na(n)
13
22
32
411
53
65
717
83
917
1023
113
1223
1329
143
1529
16103
17101
18191
19149
203
2141
2247
233
2447
2553
263
2753
2859
293
3059
3197
3229
3331
342
352
362
372
3837
3941
402
412
4241
4389
443
4589
46283
47281
48197
495
50199
5153
522
532
5453
55113
563
57113
58709
59647
6059
61311

[3,2,2,11,3,5,17,3,17,23,3,23,29,3,29,103,101,191,
 149,3,41,47,3,47,53,3,53,59,3,59,97,29,31,2,2,2,2,
 37,41,2,2,41,89,3,89,283,281,197,5,199,53,2,2,53,
 113,3,113,709,647,59,311]