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A340112 as a simple table

na(n)
12
23
35
47
521
632
7117
8119
9127
10131
11132
12133
13135
14137
15139
16149
17151
18157
19169
20171
21172
22173
23175
24177
25179
26187
27211
28212
29213
30215
31217
32218
33221
34231
35232
36233
37235
38237
39251
40253
41271
42272
43273
44275
45277
46281
47311
48319
49321
50322
51323
52325
53327
54329
55331

[2,3,5,7,21,32,117,119,127,131,132,133,135,137,
 139,149,151,157,169,171,172,173,175,177,179,187,
 211,212,213,215,217,218,221,231,232,233,235,237,
 251,253,271,272,273,275,277,281,311,319,321,322,
 323,325,327,329,331]