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A247018 as a simple table

na(n)
13
25
37
413
517
627
733
847
955
1073
1183
12105
13117
14143
15157
16187
17203
18237
19255
20293
21313
22355
23377
24423
25447
26497
27523
28577
29605
30663
31693
32755
33787
34853
35887
36957
37993
381067
391105
401183
411223
421305
431347
441433
451477
461567
471613
481707
491755
501853
511903

[3,5,7,13,17,27,33,47,55,73,83,105,117,143,157,
 187,203,237,255,293,313,355,377,423,447,497,523,
 577,605,663,693,755,787,853,887,957,993,1067,1105,
 1183,1223,1305,1347,1433,1477,1567,1613,1707,1755,
 1853,1903]