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A222294 as a simple table

na(n)
12
23
33
47
57
67
77
819
915
1019
1127
1237
1327
1443
1527
1615
1739
1827
1939
2027
2173
2227
2327
2427
2563
2639
2727
2827
29109
3075
31127
3287
3327
34123
3599
36151
37123
38163
3927
40115
4179
4227
43127
44171
4587
46199
47187
48223
49151
50135
5127
52159
53241
5427
55171
5627
5779
58271
59277
60187
6127
6227
63307

[2,3,3,7,7,7,7,19,15,19,27,37,27,43,27,15,39,27,
 39,27,73,27,27,27,63,39,27,27,109,75,127,87,27,
 123,99,151,123,163,27,115,79,27,127,171,87,199,
 187,223,151,135,27,159,241,27,171,27,79,271,277,
 187,27,27,307]