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A161955 as a simple table

na(n)
11
21
33
41
55
63
77
81
99
105
1111
123
1313
147
1515
161
1717
189
1919
205
2121
2211
2323
243
2519
2613
2727
287
2929
3015
3131
321
3357
3417
3549
369
3737
3819
3933
405
4141
4221
4343
4411
4545
4623
4747
483
4935
5019
5151
5213
5353
5427
5565
567
57105
5829
5959
6015
6161
6231
6363
641
6559
6657
6767
6817
69117
7049
7171
729
7373
7437
75105
7619
77109

[1,1,3,1,5,3,7,1,9,5,11,3,13,7,15,1,17,9,19,5,21,
 11,23,3,19,13,27,7,29,15,31,1,57,17,49,9,37,19,33,
 5,41,21,43,11,45,23,47,3,35,19,51,13,53,27,65,7,
 105,29,59,15,61,31,63,1,59,57,67,17,117,49,71,9,
 73,37,105,19,109]