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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 6 |
| 5 | 11 |
| 6 | 17 |
| 7 | 18 |
| 8 | 39 |
| 9 | 56 |
| 10 | 101 |
| 11 | 105 |
| 12 | 107 |
| 13 | 123 |
| 14 | 413 |
| 15 | 426 |
| 16 | 2607 |
| 17 | 7668 |
| 18 | 10470 |
| 19 | 11021 |
| 20 | 17753 |
| 21 | 26927 |
| 22 | 60776 |
| 23 | 98288 |
| 24 | 300476 |
| 25 | 509546 |
[1,2,5,6,11,17,18,39,56,101,105,107,123,413,426, 2607,7668,10470,11021,17753,26927,60776,98288, 300476,509546] |