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A327481 as a simple table

na(n)
11
21
31
41
53
61
71
83
93
101
111
123
137
143
151
161
173
189
199
203
211
221
233
249
2519
269
273
281
291
303
319
3225
3325
349
353
361
371
383
399
4029
4151
4229
439
443
451
461
473
489
4931
5075
5175
5231
539
543
551
561
573
589
5931
6093
61151
6293
6331
649
653
661
671
683
699
7031
71105
72235
73235
74105
7531
769
773
781

[1,1,1,1,3,1,1,3,3,1,1,3,7,3,1,1,3,9,9,3,1,1,3,9,
 19,9,3,1,1,3,9,25,25,9,3,1,1,3,9,29,51,29,9,3,1,1,
 3,9,31,75,75,31,9,3,1,1,3,9,31,93,151,93,31,9,3,1,
 1,3,9,31,105,235,235,105,31,9,3,1]