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A075240 as a simple table

na(n)
22
33
411
55
613
77
811
929
1019
1111
1219
1313
1429
1523
1619
1717
1823
1919
2031
2129
2229
2323
2429
2537
2637
2729
2831
2929
3043
3131
3237
3337
3459
3559
3643
3737
3841
3959
4043
4141
4259
4343
4447
4547
4653
4747
4859
4961
5059
5161
5259
5353
5467
5559
5659
5759
5861
5959
6073
6161
6271
6367
6479
6571
6689
6767
6871
69101
7089

[2,3,11,5,13,7,11,29,19,11,19,13,29,23,19,17,23,
 19,31,29,29,23,29,37,37,29,31,29,43,31,37,37,59,
 59,43,37,41,59,43,41,59,43,47,47,53,47,59,61,59,
 61,59,53,67,59,59,59,61,59,73,61,71,67,79,71,89,
 67,71,101,89]