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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1111968000 |
| 8 | 197700426000 |
| 9 | 19523609952000 |
| 10 | 1189018965657600 |
| 11 | 48921569240544000 |
| 12 | 1456306710444432000 |
| 13 | 33035076324990432000 |
| 14 | 594535744152421632000 |
| 15 | 8764833317995898035200 |
| 16 | 108608517794726532198000 |
[1,0,0,0,0,0,0,1111968000,197700426000, 19523609952000,1189018965657600,48921569240544000, 1456306710444432000,33035076324990432000, 594535744152421632000,8764833317995898035200, 108608517794726532198000] |