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A288641 as a simple table

na(n)
243
389
497
5251
619
7239
837
979
1083
11239
1231
13431
1419
1579
1623
17827
1843
19173
2031
21103
22179
2373
2419
25431
26193
27101
2853
29811
3047
311427
3219
33251
3429
35311
36137
3771
3823
39499
4043
4147
4219
43419
4431
45191
4683
47337
4859
491559
5019
51127
52109
53163
5467
55353
5683
57191
5883
59107

[43,89,97,251,19,239,37,79,83,239,31,431,19,79,23,
 827,43,173,31,103,179,73,19,431,193,101,53,811,47,
 1427,19,251,29,311,137,71,23,499,43,47,19,419,31,
 191,83,337,59,1559,19,127,109,163,67,353,83,191,
 83,107]