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A268392 as a simple table

na(n)
12
23
38
45
57
627
711
813
932
1017
1119
1223
13125
1429
1531
1637
1741
1843
1947
20343
2153
2259
2361
2467
2571
2673
2779
28243
2983
3089
3197
32101
33103
34107
35109
36113
371331
38127
39131
40137
41139
42149
43151
44157
45163
46167
472197
48173
49179
50181
51191
52193
53197
54199
55211
56223
57227
58229
59233
60239
61241
62251
6332768
64257
65263
66269
67271
68277
69281
70283

[2,3,8,5,7,27,11,13,32,17,19,23,125,29,31,37,41,
 43,47,343,53,59,61,67,71,73,79,243,83,89,97,101,
 103,107,109,113,1331,127,131,137,139,149,151,157,
 163,167,2197,173,179,181,191,193,197,199,211,223,
 227,229,233,239,241,251,32768,257,263,269,271,277,
 281,283]