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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 13 |
| 4 | 29 |
| 5 | 42 |
| 6 | 2129 |
| 7 | 2171 |
| 8 | 6471 |
| 9 | 28055 |
| 10 | 62581 |
| 11 | 90636 |
| 12 | 4594381 |
| 13 | 4685017 |
| 14 | 13964415 |
| 15 | 60542677 |
| 16 | 135049769 |
| 17 | 195592446 |
| 18 | 9914672069 |
| 19 | 10110264515 |
| 20 | 30135201099 |
| 21 | 130651068911 |
| 22 | 291437338921 |
| 23 | 422088407832 |
| 24 | 21395857730521 |
| 25 | 21817946138353 |
| 26 | 65031750007227 |
[1,1,3,13,29,42,2129,2171,6471,28055,62581,90636, 4594381,4685017,13964415,60542677,135049769, 195592446,9914672069,10110264515,30135201099, 130651068911,291437338921,422088407832, 21395857730521,21817946138353,65031750007227] |