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A239058 as a simple table

na(n)
11
211
313
417
519
631
741
861
971
10101
11103
12107
13109
14113
15125
16127
17131
18137
19139
20149
21151
22157
23163
24167
25173
26179
27181
28191
29193
30197
31199
32211
33241
34251
35271
36281
37311
38313
39317
40331
41401
42419
43421
44431
45461
46491
47521
48541
49571
50601
51613
52617
53619
54631
55641
56661
57691
58701
59719
60751
61761
62811
63821
64881
65911
66919
67941
68971

[1,11,13,17,19,31,41,61,71,101,103,107,109,113,
 125,127,131,137,139,149,151,157,163,167,173,179,
 181,191,193,197,199,211,241,251,271,281,311,313,
 317,331,401,419,421,431,461,491,521,541,571,601,
 613,617,619,631,641,661,691,701,719,751,761,811,
 821,881,911,919,941,971]