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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 872 |
| 3 | 396904 |
| 4 | 85082276 |
| 5 | 17784685668 |
| 6 | 3593187600532 |
| 7 | 705869301747600 |
| 8 | 135694363620306878 |
| 9 | 25624173177871048697 |
| 10 | 4767151315360734509636 |
| 11 | 875740097922120817127250 |
| 12 | 159138454239119621136483037 |
[6,872,396904,85082276,17784685668,3593187600532, 705869301747600,135694363620306878, 25624173177871048697,4767151315360734509636, 875740097922120817127250, 159138454239119621136483037] |