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A254070 as a simple table

na(n)
11
21
317
45
513
61
729
817
925
1017
11161
1217
1337
145
1565
1653
1749
1813
19125
2029
2161
221
23101
2453
2573
2629
27269
2841
2985
3017
31137
32161
3397
3425
35233
3653
37109
3817
39173
4089
41121
42161
431457
4465
45133
4617
47209
48161
49145
5037
51341
5277
53157
545
55245
56125
57169
5865
59593
6089
61181
6253
63281
64485
65193
6649
67449
68101
69205
7013

[1,1,17,5,13,1,29,17,25,17,161,17,37,5,65,53,49,
 13,125,29,61,1,101,53,73,29,269,41,85,17,137,161,
 97,25,233,53,109,17,173,89,121,161,1457,65,133,17,
 209,161,145,37,341,77,157,5,245,125,169,65,593,89,
 181,53,281,485,193,49,449,101,205,13]