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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 5 |
| 8 | 17 |
| 9 | 29 |
| 10 | 45 |
| 11 | 101 |
| 12 | 297 |
| 13 | 821 |
| 14 | 2819 |
| 15 | 10635 |
| 16 | 50419 |
| 17 | 205159 |
| 18 | 928911 |
| 19 | 4321051 |
| 20 | 24702095 |
| 21 | 144781137 |
| 22 | 1031901327 |
| 23 | 7307383577 |
| 24 | 64959695293 |
| 25 | 541722263927 |
| 26 | 5441453632793 |
[1,1,1,1,1,1,5,17,29,45,101,297,821,2819,10635, 50419,205159,928911,4321051,24702095,144781137, 1031901327,7307383577,64959695293,541722263927, 5441453632793] |