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A187369 as a simple table

na(n)
11
21
31
41
53
61
75
819
99
101
1111
1213
1313
1411
1521
161
1715
185
1941
2041
2139
2217
237
241
2525
261
2727
2851
2913
3011
3147
3239
3337
3439
351
3645
3715
385
3923
4013
4159
425
4347
44175
4535
4611
4753
4815
4919
50131
5141
521
5345
5417
551
5653
5783
5849
5985
60159
61123
6269
6323
6429
6523
66207
6737
6819
6937
7039
7191
7213
7357

[1,1,1,1,3,1,5,19,9,1,11,13,13,11,21,1,15,5,41,41,
 39,17,7,1,25,1,27,51,13,11,47,39,37,39,1,45,15,5,
 23,13,59,5,47,175,35,11,53,15,19,131,41,1,45,17,1,
 53,83,49,85,159,123,69,23,29,23,207,37,19,37,39,
 91,13,57]