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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 32 |
| 3 | 320 |
| 4 | 26240 |
| 5 | 1240024 |
| 6 | 11160256 |
| 7 | 2297798771761759543384 |
| 8 | 15075857741528904364175224 |
| 9 | 8135830264 |
| 10 | 5931020266096 |
| 11 | 659002251784 |
| 12 | 350220815692997944 |
[0,32,320,26240,1240024,11160256, 2297798771761759543384,15075857741528904364175224, 8135830264,5931020266096,659002251784, 350220815692997944] |