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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 8 |
| 6 | 18 |
| 7 | 21 |
| 8 | 33 |
| 9 | 56 |
| 10 | 301 |
| 11 | 381 |
| 12 | 426 |
| 13 | 769 |
| 14 | 1123 |
| 15 | 1638 |
| 16 | 2037 |
| 17 | 2660 |
| 18 | 3284 |
| 19 | 4723 |
| 20 | 5686 |
| 21 | 17227 |
| 22 | 22084 |
| 23 | 25009 |
| 24 | 36176 |
| 25 | 125076 |
| 26 | 141019 |
[1,2,3,6,8,18,21,33,56,301,381,426,769,1123,1638, 2037,2660,3284,4723,5686,17227,22084,25009,36176, 125076,141019] |