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A005109 as a simple table

na(n)
12
23
35
47
513
617
719
837
973
1097
11109
12163
13193
14257
15433
16487
17577
18769
191153
201297
211459
222593
232917
243457
253889
2610369
2712289
2817497
2918433
3039367
3152489
3265537
33139969
34147457
35209953
36331777
37472393
38629857
39746497
40786433
41839809
42995329
431179649
441492993
451769473
461990657

[2,3,5,7,13,17,19,37,73,97,109,163,193,257,433,
 487,577,769,1153,1297,1459,2593,2917,3457,3889,
 10369,12289,17497,18433,39367,52489,65537,139969,
 147457,209953,331777,472393,629857,746497,786433,
 839809,995329,1179649,1492993,1769473,1990657]