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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 5 |
| 8 | 9 |
| 9 | 21 |
| 10 | 39 |
| 11 | 159 |
| 12 | 427 |
| 13 | 2501 |
| 14 | 9027 |
| 15 | 58503 |
| 16 | 271185 |
| 17 | 2371669 |
| 18 | 14600987 |
| 19 | 167228191 |
| 20 | 1344019107 |
| 21 | 19775648697 |
| 22 | 206847230557 |
| 23 | 3987249030381 |
| 24 | 54541478154327 |
| 25 | 1370106516904685 |
| 26 | 24431476697291095 |
[1,1,1,1,1,1,5,9,21,39,159,427,2501,9027,58503, 271185,2371669,14600987,167228191,1344019107, 19775648697,206847230557,3987249030381, 54541478154327,1370106516904685,24431476697291095] |