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A217090 as a simple table

na(n)
15
27
311
413
517
619
729
837
941
1043
1147
1253
1359
1461
1567
1671
1773
1879
1983
2089
2197
22101
23103
24107
25109
26113
27127
28131
29139
30149
31151
32157
33163
34167
35173
36179
37181
38193
39197
40199
41211
42223
43227
44229
45233
46241
47251
48257
49263
50269
51271
52281
53283
54293
55307
56311
57313

[5,7,11,13,17,19,29,37,41,43,47,53,59,61,67,71,73,
 79,83,89,97,101,103,107,109,113,127,131,139,149,
 151,157,163,167,173,179,181,193,197,199,211,223,
 227,229,233,241,251,257,263,269,271,281,283,293,
 307,311,313]