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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 13 |
| 3 | 0 |
| 4 | 17 |
| 5 | 1111111111111111111 |
| 6 | 113 |
| 7 | 1117 |
| 8 | 11119 |
| 9 | 1123 |
| 10 | 1129 |
| 11 | 131 |
| 12 | 137 |
| 13 | 11111141 |
| 14 | 111143 |
| 15 | 11111111111111111111111111111147 |
| 16 | 1153 |
| 17 | 11159 |
| 18 | 11161 |
| 19 | 167 |
| 20 | 1171 |
| 21 | 173 |
| 22 | 179 |
| 23 | 1111183 |
| 24 | 1111189 |
| 25 | 197 |
| 26 | 11111101 |
| 27 | 1103 |
| 28 | 11111111111111107 |
| 29 | 1109 |
[0,13,0,17,1111111111111111111,113,1117,11119, 1123,1129,131,137,11111141,111143, 11111111111111111111111111111147,1153,11159,11161, 167,1171,173,179,1111183,1111189,197,11111101, 1103,11111111111111107,1109] |