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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 13 |
| 6 | 17 |
| 7 | 31 |
| 8 | 37 |
| 9 | 71 |
| 10 | 73 |
| 11 | 79 |
| 12 | 97 |
| 13 | 113 |
| 14 | 131 |
| 15 | 197 |
| 16 | 199 |
| 17 | 311 |
| 18 | 337 |
| 19 | 373 |
| 20 | 719 |
| 21 | 733 |
| 22 | 919 |
| 23 | 971 |
| 24 | 991 |
| 25 | 1193 |
| 26 | 1931 |
| 27 | 3119 |
| 28 | 3779 |
| 29 | 7793 |
| 30 | 7937 |
| 31 | 9311 |
| 32 | 9377 |
| 33 | 11939 |
| 34 | 19391 |
| 35 | 19937 |
| 36 | 37199 |
| 37 | 39119 |
| 38 | 71993 |
| 39 | 91193 |
| 40 | 93719 |
| 41 | 93911 |
| 42 | 99371 |
| 43 | 193939 |
| 44 | 199933 |
| 45 | 319993 |
| 46 | 331999 |
| 47 | 391939 |
[2,3,5,7,13,17,31,37,71,73,79,97,113,131,197,199, 311,337,373,719,733,919,971,991,1193,1931,3119, 3779,7793,7937,9311,9377,11939,19391,19937,37199, 39119,71993,91193,93719,93911,99371,193939,199933, 319993,331999,391939] |