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A157139 as a simple table

na(n)
13
29
311
417
523
631
735
839
949
1051
1155
1259
1361
1473
1577
1687
1789
1895
1997
2099
21101
22103
23107
24123
25125
26127
27129
28131
29133
30137
31139
32141
33147
34149
35157
36159
37161
38163
39169
40171
41173
42175
43177
44181
45195
46199
47235
48237
49253
50257
51279
52305
53309
54319
55323
56341
57343

[3,9,11,17,23,31,35,39,49,51,55,59,61,73,77,87,89,
 95,97,99,101,103,107,123,125,127,129,131,133,137,
 139,141,147,149,157,159,161,163,169,171,173,175,
 177,181,195,199,235,237,253,257,279,305,309,319,
 323,341,343]