| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 25 |
| 6 | 37 |
| 7 | 113 |
| 8 | 173 |
| 9 | 193 |
| 10 | 2183 |
| 11 | 11229 |
| 12 | 15065 |
| 13 | 15845 |
| 14 | 30817 |
| 15 | 48443 |
| 16 | 275485 |
| 17 | 1267909 |
| 18 | 2264915 |
| 19 | 5812827 |
| 20 | 7110201 |
[1,2,3,9,25,37,113,173,193,2183,11229,15065,15845, 30817,48443,275485,1267909,2264915,5812827, 7110201] |