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A248793 as a simple table

na(n)
12
23
35
411
57
617
711
813
923
1023
1117
1219
1341
1431
1523
1659
1741
1829
1971
2031
2147
2253
2347
2437
2559
2689
2741
2843
2983
3071
3147
3271
3397
3453
3571
3679
3789
3859
39167
4061
41103
4283
4367
4471
4573
46113
47139
48167
4979
5083
51223
52107
53131
54179
5589
56233
57167
58127
59251
6097
61101
62103

[2,3,5,11,7,17,11,13,23,23,17,19,41,31,23,59,41,
 29,71,31,47,53,47,37,59,89,41,43,83,71,47,71,97,
 53,71,79,89,59,167,61,103,83,67,71,73,113,139,167,
 79,83,223,107,131,179,89,233,167,127,251,97,101,
 103]