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A239710 as a simple table

na(n)
17
211
313
419
531
637
741
843
967
1073
1197
12109
13131
14137
15151
16157
17193
18211
19223
20241
21271
22307
23421
24463
25521
26577
27601
28631
29641
30733
31739
32751
33757
34769
35811
361033
371123
381153
391303
401453
411483
421723
431741
441873
452053
462081
472113
482269
492551
502917
512971
523251
533307
543391
553541
563907
574099

[7,11,13,19,31,37,41,43,67,73,97,109,131,137,151,
 157,193,211,223,241,271,307,421,463,521,577,601,
 631,641,733,739,751,757,769,811,1033,1123,1153,
 1303,1453,1483,1723,1741,1873,2053,2081,2113,2269,
 2551,2917,2971,3251,3307,3391,3541,3907,4099]