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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 0 |
| 12 | 66 |
| 13 | 286 |
| 14 | 4004 |
| 15 | 33033 |
| 16 | 328328 |
| 17 | 3150576 |
| 18 | 31286970 |
| 19 | 316394650 |
| 20 | 3928974907 |
| 21 | 48404715723 |
| 22 | 526502083107 |
| 23 | 6475762500130 |
| 24 | 88834932638892 |
| 25 | 1136875206056150 |
| 26 | 14448572171583550 |
| 27 | 197345257083676845 |
| 28 | 2738327374576989195 |
| 29 | 37603158111513714720 |
| 30 | 528367079280330690400 |
[1,0,66,286,4004,33033,328328,3150576,31286970, 316394650,3928974907,48404715723,526502083107, 6475762500130,88834932638892,1136875206056150, 14448572171583550,197345257083676845, 2738327374576989195,37603158111513714720, 528367079280330690400] |