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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 21318 |
| 3 | 111399602430962720 |
| 4 | 219754881677312748254868619396977023490 |
| 5 | 91574665590547903212939476569574243557076290573519342040406738188187312 |
[1,21318,111399602430962720, 219754881677312748254868619396977023490, 91574665590547903212939476569574243557076290573519\ 342040406738188187312] |