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A185046 as a simple table

na(n)
15
23
35
47
513
63
713
83
95
103
113
1211
130
147
155
1619
1737
1811
195
207
215
227
2337
2411
255
2631
2753
2831
2913
3023
315
327
335
347
3513
3623
3713
3819
395
407
41421
4247
435
447
455
4611
4713
4811
495
5043
515
5211
5361
5423
555
5619
575
587
595
605
6153
627
6317
647
6513
6611
6713
687
69113
707
71373
7211
7317
747

[5,3,5,7,13,3,13,3,5,3,3,11,0,7,5,19,37,11,5,7,5,
 7,37,11,5,31,53,31,13,23,5,7,5,7,13,23,13,19,5,7,
 421,47,5,7,5,11,13,11,5,43,5,11,61,23,5,19,5,7,5,
 5,53,7,17,7,13,11,13,7,113,7,373,11,17,7]