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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 9 |
| 3 | 60 |
| 4 | 79 |
| 5 | 59 |
| 6 | 137 |
| 7 | 479 |
| 8 | 2897 |
| 9 | 1397 |
| 10 | 24474 |
| 11 | 63515 |
| 12 | 71287 |
| 13 | 191542 |
| 14 | 1432289 |
| 15 | 1766633 |
| 16 | 1380465 |
| 17 | 2894629 |
| 18 | 1464385 |
| 19 | 10676561 |
[0,9,60,79,59,137,479,2897,1397,24474,63515,71287, 191542,1432289,1766633,1380465,2894629,1464385, 10676561] |