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A076074 as a simple table

na(n)
12
21
33
45
57
611
713
817
919
1023
1129
1231
1337
1441
1543
1647
1753
1859
1961
2067
2171
2273
2379
2483
2589
2697
27101
28103
29107
30109
31113
32127
33131
34137
35139
36149
37151
38157
39163
40167
41173
42179
43181
44191
45193
46197
47199
48211
49223
50227
51229
52233
53239
54241
55251
56257
57263
58269
59271
60277

[2,1,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,
 61,67,71,73,79,83,89,97,101,103,107,109,113,127,
 131,137,139,149,151,157,163,167,173,179,181,191,
 193,197,199,211,223,227,229,233,239,241,251,257,
 263,269,271,277]