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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 44 |
| 3 | 22119391 |
| 4 | 649096595660632 |
| 5 | 496395338691326078075775 |
| 6 | 6287689969637354023974752834007500 |
| 7 | 936126190440040230109711933212013162356155460 |
[0,44,22119391,649096595660632, 496395338691326078075775, 6287689969637354023974752834007500, 936126190440040230109711933212013162356155460] |