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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 7 |
| 4 | 9 |
| 5 | 10 |
| 6 | 11 |
| 7 | 16 |
| 8 | 42 |
| 9 | 53 |
| 10 | 78 |
| 11 | 321 |
| 12 | 699 |
| 13 | 1858 |
| 14 | 3425 |
| 15 | 4899 |
| 16 | 5734 |
| 17 | 11081 |
| 18 | 11675 |
| 19 | 12136 |
| 20 | 14056 |
| 21 | 16074 |
| 22 | 77969 |
| 23 | 158465 |
[1,6,7,9,10,11,16,42,53,78,321,699,1858,3425,4899, 5734,11081,11675,12136,14056,16074,77969,158465] |