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A339347 as a simple table

na(n)
15
27
311
413
519
631
737
843
961
1067
1171
1273
1379
14101
15131
16151
17191
18197
19211
20239
21251
22281
23311
24331
25401
26419
27421
28431
29443
30461
31463
32491
33521
34547
35571
36599
37601
38617
39647
40659
41677
42683
43727
44743
45827
46859
47883
48911
49947
50953
51967
521013
531093
541103

[5,7,11,13,19,31,37,43,61,67,71,73,79,101,131,151,
 191,197,211,239,251,281,311,331,401,419,421,431,
 443,461,463,491,521,547,571,599,601,617,647,659,
 677,683,727,743,827,859,883,911,947,953,967,1013,
 1093,1103]