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A023505 as a simple table

na(n)
11
21
31
43
55
63
71
83
911
107
113
123
135
143
1523
1613
1729
183
193
205
213
223
2341
2411
253
265
273
2853
293
307
313
325
3317
343
3537
363
373
383
3983
4043
4189
423
435
443
457
463
473
483
49113
503
5129
527
533
545
551
56131
5767
583
593
605
613
6273
633
645
653
6679
673
683
69173
703
7111
72179
733
743
753
76191
7797
783
795
803
8111
823
835
843
853

[1,1,1,3,5,3,1,3,11,7,3,3,5,3,23,13,29,3,3,5,3,3,
 41,11,3,5,3,53,3,7,3,5,17,3,37,3,3,3,83,43,89,3,5,
 3,7,3,3,3,113,3,29,7,3,5,1,131,67,3,3,5,3,73,3,5,
 3,79,3,3,173,3,11,179,3,3,3,191,97,3,5,3,11,3,5,3,
 3]