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A117159 as a simple table

na(n)
12
23
35
47
513
617
731
837
943
1053
1171
1273
13113
14131
15137
16151
17157
18173
19211
20223
21311
22317
23359
24367
25389
26431
27557
28571
29593
30673
31751
32827
33839
34929
35953
36983
371117
381151
391153
401171
411223
421279
431297
441367
451447
461511
471531
481553
491571
501579
511597
521621

[2,3,5,7,13,17,31,37,43,53,71,73,113,131,137,151,
 157,173,211,223,311,317,359,367,389,431,557,571,
 593,673,751,827,839,929,953,983,1117,1151,1153,
 1171,1223,1279,1297,1367,1447,1511,1531,1553,1571,
 1579,1597,1621]