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A317931 as a simple table

na(n)
11
21
31
43
53
61
73
85
93
103
115
123
135
143
151
1635
175
183
197
209
215
225
237
245
2519
265
275
289
297
301
315
3263
331
345
359
369
3711
387
395
4015
4111
425
4313
4415
4513
467
479
4835
4927
5019
517
5215
5313
545
557
5615
573
587
5911
603
619
625
63-7
64231
65-1
661
6711
6815
697
709
7113
7215
7315
7411
7547
7621
7719
785
7913
80105
8127
8211
8319
8415
8527
8613
8711
8825
8917
9013
9123
9221
9311
949
951
9663

[1,1,1,3,3,1,3,5,3,3,5,3,5,3,1,35,5,3,7,9,5,5,7,5,
 19,5,5,9,7,1,5,63,1,5,9,9,11,7,5,15,11,5,13,15,13,
 7,9,35,27,19,7,15,13,5,7,15,3,7,11,3,9,5,-7,231,
 -1,1,11,15,7,9,13,15,15,11,47,21,19,5,13,105,27,
 11,19,15,27,13,11,25,17,13,23,21,11,9,1,63]