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A275391 as a simple table

na(n)
11
23
35
43
53
65
72
83
95
103
1119
1211
1311
145
1515
167
1715
185
1911
203
215
2219
2310
2411
257
2611
2717
2811
2913
3015
315
327
3329
3415
3523
3611
3711
3811
3911
403
4115
425
4335
4419
4523
4621
4722
4815
4913
507
5115
5211
5323
5417
5519
5611
5711
5813
5928
6015
6111
625
635
6415
6515
6629
6721
6815
6965
7023
7134
7211
734
7411
7529
7611
7739
7811
7923
807
8117

[1,3,5,3,3,5,2,3,5,3,19,11,11,5,15,7,15,5,11,3,5,
 19,10,11,7,11,17,11,13,15,5,7,29,15,23,11,11,11,
 11,3,15,5,35,19,23,21,22,15,13,7,15,11,23,17,19,
 11,11,13,28,15,11,5,5,15,15,29,21,15,65,23,34,11,
 4,11,29,11,39,11,23,7,17]