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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11440 |
| 2 | 27810640 |
| 3 | 24584605760 |
| 4 | 10323075958624 |
| 5 | 2424984388825856 |
| 6 | 356031798904887040 |
| 7 | 35384083398854927360 |
[1,11440,27810640,24584605760,10323075958624, 2424984388825856,356031798904887040, 35384083398854927360] |