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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 16 |
| 6 | 33 |
| 7 | 35 |
| 8 | 51 |
| 9 | 371 |
| 10 | 1539 |
| 11 | 1564 |
| 12 | 2897 |
| 13 | 3431 |
| 14 | 4448 |
| 15 | 6593 |
| 16 | 7066 |
| 17 | 7345 |
| 18 | 11770 |
| 19 | 20026 |
| 20 | 22114 |
| 21 | 23945 |
| 22 | 46946 |
| 23 | 60772 |
[1,2,4,7,16,33,35,51,371,1539,1564,2897,3431,4448, 6593,7066,7345,11770,20026,22114,23945,46946, 60772] |