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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 127 |
| 3 | 1287 |
| 4 | 13021 |
| 5 | 131781 |
| 6 | 1333683 |
| 7 | 13497523 |
| 8 | 136601483 |
| 9 | 1382473365 |
| 10 | 13991301963 |
| 11 | 141598771951 |
| 12 | 1433048351749 |
| 13 | 14503145402825 |
| 14 | 146778876175813 |
| 15 | 1485473522677393 |
| 16 | 15033713597401013 |
| 17 | 152148484020986879 |
[13,127,1287,13021,131781,1333683,13497523, 136601483,1382473365,13991301963,141598771951, 1433048351749,14503145402825,146778876175813, 1485473522677393,15033713597401013, 152148484020986879] |