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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 7 |
| 5 | 8 |
| 6 | 13 |
| 7 | 22 |
| 8 | 33 |
| 9 | 53 |
| 10 | 58 |
| 11 | 62 |
| 12 | 142 |
| 13 | 189 |
| 14 | 220 |
| 15 | 479 |
| 16 | 496 |
| 17 | 503 |
| 18 | 760 |
| 19 | 1464 |
| 20 | 6503 |
| 21 | 9477 |
| 22 | 13861 |
| 23 | 23881 |
[1,3,6,7,8,13,22,33,53,58,62,142,189,220,479,496, 503,760,1464,6503,9477,13861,23881] |