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A250097 as a simple table

na(n)
21
31
41
51
65
71
81
91
107
111
125
131
149
154
161
171
185
191
207
215
2213
231
245
251
2615
271
289
291
3031
311
321
337
3419
356
365
371
3821
398
407
411
4241
431
4413
454
4625
471
485
491
507
5110
5215
531
545
558
569
5711
5831
591
6031
611
6233
635
641
659
6661
671
6819
6913
7059
711
725
731
7439
754
7621
779
7871
791
807

[1,1,1,1,5,1,1,1,7,1,5,1,9,4,1,1,5,1,7,5,13,1,5,1,
 15,1,9,1,31,1,1,7,19,6,5,1,21,8,7,1,41,1,13,4,25,
 1,5,1,7,10,15,1,5,8,9,11,31,1,31,1,33,5,1,9,61,1,
 19,13,59,1,5,1,39,4,21,9,71,1,7]