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A104998 as a simple table

na(n)
173
289
389
423
513
631
731
847
973
1071
1173
1237
1379
1479
1543
1631
1779
1817
1979
2047
2173
2237
2353
2431
2561
2647
2761
2823
2973
3037
3147
3283
3313
3489
3541
3653
3737
3823
3913
4047
4147
4223
4341
4441
4567
4679
4729
4831
4919
5037
5189
5297
5329
5453
5553
5623
5747
5879
5929
6013
6171
6283
6331
6423
6523
6683
6761
6867
6989

[73,89,89,23,13,31,31,47,73,71,73,37,79,79,43,31,
 79,17,79,47,73,37,53,31,61,47,61,23,73,37,47,83,
 13,89,41,53,37,23,13,47,47,23,41,41,67,79,29,31,
 19,37,89,97,29,53,53,23,47,79,29,13,71,83,31,23,
 23,83,61,67,89]