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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 8 |
| 7 | 22 |
| 8 | 23 |
| 9 | 259 |
| 10 | 3598 |
| 11 | 4808 |
| 12 | 7715 |
| 13 | 8821 |
| 14 | 9155 |
| 15 | 10765 |
| 16 | 29745 |
| 17 | 1776197 |
| 18 | 2417850 |
| 19 | 11568019 |
| 20 | 1617124497 |
| 21 | 5632000774 |
[1,2,3,5,7,8,22,23,259,3598,4808,7715,8821,9155, 10765,29745,1776197,2417850,11568019,1617124497, 5632000774] |