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A087525 as a simple table

na(n)
15
27
37
411
511
611
711
813
913
1013
1113
1217
1317
1417
1517
1617
1717
1819
1919
2019
2119
2219
2319
2423
2523
2623
2723
2823
2923
3023
3123
3229
3329
3429
3529
3629
3729
3829
3929
4029
4131
4231
4331
4431
4531
4631
4731
4831
4931
5037
5137
5237
5337
5437
5537
5637
5737
5837
5937
6037
6141
6241
6341
6441
6541
6641
6741
6841
6941
7041

[5,7,7,11,11,11,11,13,13,13,13,17,17,17,17,17,17,
 19,19,19,19,19,19,23,23,23,23,23,23,23,23,29,29,
 29,29,29,29,29,29,29,31,31,31,31,31,31,31,31,31,
 37,37,37,37,37,37,37,37,37,37,37,41,41,41,41,41,
 41,41,41,41,41]