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A101989 as a simple table

na(n)
12
23
35
47
511
631
771
819
923
1029
1131
1273
1341
1443
1547
1653
1759
1861
1967
2071
2173
2297
2383
2489
2597
26101
27103
28701
29109
30311
31271
32311
33317
34193
35941
36151
37751
38631
39761
40317
41971
42811
43911
44193
45971
46991
47211
48223
49227
50229
51233
52293
53421
54521
55257
56263
57269
58271
59727

[2,3,5,7,11,31,71,19,23,29,31,73,41,43,47,53,59,
 61,67,71,73,97,83,89,97,101,103,701,109,311,271,
 311,317,193,941,151,751,631,761,317,971,811,911,
 193,971,991,211,223,227,229,233,293,421,521,257,
 263,269,271,727]