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| n | a(n) |
|---|---|
| 0 | 151 |
| 1 | 373 |
| 2 | 95959 |
| 3 | 9515959 |
| 4 | 159595151 |
| 5 | 159595951 |
| 6 | 15151595951 |
| 7 | 15951595151 |
| 8 | 95951515159 |
| 9 | 1515159515951 |
| 10 | 1515959515951 |
| 11 | 1515959595151 |
| 12 | 1595159515151 |
| 13 | 1595159595151 |
| 14 | 9515151515159 |
| 15 | 9515159515159 |
| 16 | 9515159595959 |
| 17 | 9595159515959 |
[151,373,95959,9515959,159595151,159595951, 15151595951,15951595151,95951515159,1515159515951, 1515959515951,1515959595151,1595159515151, 1595159595151,9515151515159,9515159515159, 9515159595959,9595159515959] |