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A082684 as a simple table

na(n)
15
27
311
413
513
617
719
817
919
1023
1119
1223
1323
1429
1531
1629
1731
1829
1937
2031
2137
2231
2341
2443
2537
2637
2741
2843
2941
3043
3147
3247
3341
3453
3543
3653
3747
3843
3959
4061
4147
4253
4347
4453
4559
4661
4753
4859
4967
5053
5161
5259
5361
5471
5573
5667
5759
5861
5967
6071

[5,7,11,13,13,17,19,17,19,23,19,23,23,29,31,29,31,
 29,37,31,37,31,41,43,37,37,41,43,41,43,47,47,41,
 53,43,53,47,43,59,61,47,53,47,53,59,61,53,59,67,
 53,61,59,61,71,73,67,59,61,67,71]