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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 28 |
| 6 | 31 |
| 7 | 32 |
| 8 | 38 |
| 9 | 68 |
| 10 | 134 |
| 11 | 158 |
| 12 | 254 |
| 13 | 311 |
| 14 | 337 |
| 15 | 392 |
| 16 | 874 |
| 17 | 2747 |
| 18 | 3502 |
| 19 | 4735 |
| 20 | 6142 |
| 21 | 14140 |
| 22 | 17095 |
| 23 | 20066 |
| 24 | 21104 |
| 25 | 26743 |
[1,2,4,10,28,31,32,38,68,134,158,254,311,337,392, 874,2747,3502,4735,6142,14140,17095,20066,21104, 26743] |