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A259687 as a simple table

na(n)
11
21
31
481
55
67
71
81
913
101
1111
121
13185
141
151
167
171
1827
191
201
219
221
239
249
2511
263
2715
28325
291
3011
3117
321
331
341
351
361
375
3825
3933
4011
417
4247
43801
445
45193
461
471
481
4919
5011
5113
5225
5321
5417
55635
565
5737
581
591
601
611
62177
6323
641
651
6643
679
681
695465
7027
711
722721
731
7417

[1,1,1,81,5,7,1,1,13,1,11,1,185,1,1,7,1,27,1,1,9,
 1,9,9,11,3,15,325,1,11,17,1,1,1,1,1,5,25,33,11,7,
 47,801,5,193,1,1,1,19,11,13,25,21,17,635,5,37,1,1,
 1,1,177,23,1,1,43,9,1,5465,27,1,2721,1,17]