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A071615 as a simple table

na(n)
17
217
315
419
55
643
71
819
95
1017
117
12167
131
1411
153
1619
171
1867
191
2017
2117
227
235
24211
251
267
2711
2813
293
30139
311
3231
339
341
355
36109
371
381
393
4085
413
4261
431
4411
451
467
471
48211
491
5011
515
527
533
5431
555
5631
571
5813
591
60353
611
621
639
6431
653
6671
671
685
693
7019
711
72317
731
745
753
761
771
7831
791
80167
817
827
835

[7,17,15,19,5,43,1,19,5,17,7,167,1,11,3,19,1,67,1,
 17,17,7,5,211,1,7,11,13,3,139,1,31,9,1,5,109,1,1,
 3,85,3,61,1,11,1,7,1,211,1,11,5,7,3,31,5,31,1,13,
 1,353,1,1,9,31,3,71,1,5,3,19,1,317,1,5,3,1,1,31,1,
 167,7,7,5]