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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 78 |
| 3 | 286 |
| 4 | 715 |
| 5 | 1287 |
| 6 | 1716 |
| 7 | 1716 |
| 8 | 1287 |
| 9 | 715 |
| 10 | 286 |
| 11 | 78 |
| 12 | 13 |
| 13 | 1 |
[1,13,78,286,715,1287,1716,1716,1287,715,286,78, 13,1] |