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A251104 as a simple table

na(n)
11
22
33
42
53
65
77
811
93
107
1111
1217
1313
145
1517
1613
1719
1829
197
202
2123
227
233
2441
2529
2611
2731
2847
2911
305
3137
327
3313
3459
3541
3631
3743
3813
3947
4071
417
4237
4317
4411
4553
465
4719
4843
4959
5089
5161
5223
537
5419
5567
56101
5723
5813
5971
60107
6173
6211
6379
6417
653
6661
6783
685
6929

[1,2,3,2,3,5,7,11,3,7,11,17,13,5,17,13,19,29,7,2,
 23,7,3,41,29,11,31,47,11,5,37,7,13,59,41,31,43,13,
 47,71,7,37,17,11,53,5,19,43,59,89,61,23,7,19,67,
 101,23,13,71,107,73,11,79,17,3,61,83,5,29]