| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 11 |
| 6 | 13 |
| 7 | 17 |
| 8 | 28 |
| 9 | 46 |
| 10 | 67 |
| 11 | 136 |
| 12 | 536 |
| 13 | 619 |
| 14 | 746 |
| 15 | 2420 |
| 16 | 2672 |
| 17 | 8228 |
| 18 | 10861 |
| 19 | 13424 |
| 20 | 16047 |
| 21 | 18075 |
| 22 | 37720 |
| 23 | 56371 |
| 24 | 75055 |
[1,2,3,8,11,13,17,28,46,67,136,536,619,746,2420, 2672,8228,10861,13424,16047,18075,37720,56371, 75055] |