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A068678 as a simple table

na(n)
17
219
337
441
547
671
783
891
9103
10127
11157
12161
13187
14199
15203
16209
17239
18257
19281
20293
21311
22349
23371
24377
25391
26413
27421
28433
29463
30467
31479
32491
33511
34539
35547
36551
37587
38619
39629
40661
41677
42689
43721
44749
45769
46787
47791
48803
49817
50859
51871
52883
53923

[7,19,37,41,47,71,83,91,103,127,157,161,187,199,
 203,209,239,257,281,293,311,349,371,377,391,413,
 421,433,463,467,479,491,511,539,547,551,587,619,
 629,661,677,689,721,749,769,787,791,803,817,859,
 871,883,923]