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A056775 as a simple table

na(n)
15
27
311
417
519
629
731
841
945
1047
1159
1261
1365
1467
1571
1680
1789
1897
1999
20101
21112
22117
23127
24135
25137
26139
27151
28167
29171
30176
31179
32181
33196
34199
35207
36209
37211
38227
39229
40239
41251
42257
43269
44271
45272
46279
47281
48294
49304
50310
51312
52337
53347
54367
55369
56389

[5,7,11,17,19,29,31,41,45,47,59,61,65,67,71,80,89,
 97,99,101,112,117,127,135,137,139,151,167,171,176,
 179,181,196,199,207,209,211,227,229,239,251,257,
 269,271,272,279,281,294,304,310,312,337,347,367,
 369,389]