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A167480 as a simple table

na(n)
12
21
32
47
53
613
74
819
923
1029
115
1237
136
1443
1547
1653
177
1861
198
2071
2173
2279
239
2489
2597
26101
27103
28107
2910
30113
3111
32131
33137
34139
35149
36151
3712
38163
39167
40173
4113
42181
4314
44193
45197
46199
4715
48223
49227
50229
51233
52239
5316
54251
55257
56263
57269
58271
5917
60281
6118
62293
63307

[2,1,2,7,3,13,4,19,23,29,5,37,6,43,47,53,7,61,8,
 71,73,79,9,89,97,101,103,107,10,113,11,131,137,
 139,149,151,12,163,167,173,13,181,14,193,197,199,
 15,223,227,229,233,239,16,251,257,263,269,271,17,
 281,18,293,307]