| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 900 |
| 4 | 2592000 |
| 5 | 152587890625 |
| 6 | 88060251340800000 |
| 7 | 608462684559542896890625 |
| 8 | 39491298245528363382865920000000 |
| 9 | 24652445390187744298440793976121600000000 |
| 10 | 136940866302168849110603332519531250000000000000000 |
[1,5,900,2592000,152587890625,88060251340800000, 608462684559542896890625, 39491298245528363382865920000000, 24652445390187744298440793976121600000000, 13694086630216884911060333251953125000000000000000\ 0] |