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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 1 |
| 15 | 1 |
| 16 | 6 |
| 17 | 37 |
| 18 | 432 |
| 19 | 8119 |
| 20 | 191254 |
| 21 | 4855919 |
| 22 | 127937854 |
| 23 | 3482858263 |
| 24 | 98176518258 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,6,37,432,8119, 191254,4855919,127937854,3482858263,98176518258] |