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A176406 as a simple table

na(n)
17
213
319
423
531
633
737
847
949
1053
1155
1263
1367
1475
1583
1685
1789
1891
1993
20109
21113
22117
23119
24121
25127
26131
27139
28141
29143
30153
31157
32159
33167
34175
35181
36183
37185
38199
39201
40203
41207
42211
43213
44215
45217
46219
47233
48235
49245
50247
51251
52257
53263
54265
55285
56287

[7,13,19,23,31,33,37,47,49,53,55,63,67,75,83,85,
 89,91,93,109,113,117,119,121,127,131,139,141,143,
 153,157,159,167,175,181,183,185,199,201,203,207,
 211,213,215,217,219,233,235,245,247,251,257,263,
 265,285,287]