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A135540 as a simple table

na(n)
11
23
31
47
53
63
71
815
97
107
113
127
133
143
151
1631
1715
1815
197
2015
217
227
233
2415
257
267
273
287
293
303
311
3263
3331
3431
3515
3631
3715
3815
397
4031
4115
4215
437
4415
457
467
473
4831
4915
5015
517
5215
537
547
553
5615
577
587
593
607
613
623
631
64127
6563
6663
6731
6863
6931
7031
7115
7263
7331
7431
7515
7631
7715
7815
797
8063
8131
8231
8315
8431
8515

[1,3,1,7,3,3,1,15,7,7,3,7,3,3,1,31,15,15,7,15,7,7,
 3,15,7,7,3,7,3,3,1,63,31,31,15,31,15,15,7,31,15,
 15,7,15,7,7,3,31,15,15,7,15,7,7,3,15,7,7,3,7,3,3,
 1,127,63,63,31,63,31,31,15,63,31,31,15,31,15,15,7,
 63,31,31,15,31,15]