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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 13 |
| 3 | 313 |
| 4 | 538 |
| 5 | 13741 |
| 6 | 43386 |
| 7 | 48886 |
| 8 | 991886 |
| 9 | 141415133 |
| 10 | 2880781113 |
| 11 | 4721227413 |
| 12 | 19567549258 |
| 13 | 538423521386 |
| 14 | 137473211871979931561 |
[1,13,313,538,13741,43386,48886,991886,141415133, 2880781113,4721227413,19567549258,538423521386, 137473211871979931561] |