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A049552 as a simple table

na(n)
12
27
323
447
573
679
789
8103
9113
10127
11151
12167
13199
14223
15233
16239
17257
18263
19337
20353
21359
22367
23383
24431
25439
26463
27479
28487
29503
30577
31593
32599
33607
34617
35647
36719
37727
38743
39823
40839
41863
42887
43911
44919
45937
46967
47983
481033
491039
501049
511063
521087

[2,7,23,47,73,79,89,103,113,127,151,167,199,223,
 233,239,257,263,337,353,359,367,383,431,439,463,
 479,487,503,577,593,599,607,617,647,719,727,743,
 823,839,863,887,911,919,937,967,983,1033,1039,
 1049,1063,1087]