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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 3 |
| 8 | 66 |
| 9 | 8029 |
| 10 | 3484760 |
| 11 | 2595985770 |
| 12 | 2815099031417 |
| 13 | 4230059694039460 |
| 14 | 8529853839173455678 |
| 15 | 22496718465713456081402 |
| 16 | 75951258300080722467845995 |
| 17 | 322269241532759484921710401976 |
[0,0,0,0,0,0,1,3,66,8029,3484760,2595985770, 2815099031417,4230059694039460, 8529853839173455678,22496718465713456081402, 75951258300080722467845995, 322269241532759484921710401976] |