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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5761 |
| 4 | 31334401 |
| 5 | 136768389121 |
| 6 | 820260207643852801 |
| 7 | 18335066086016219275591681 |
| 8 | 328113739821565326934355528908801 |
| 9 | 13331506915406061943466437913131131863041 |
| 10 | 709215733340453866919693651825288232662162472960001 |
| 11 | 51979148071106263356020510647871238516054065671329809222860801 |
[1,1,5761,31334401,136768389121, 820260207643852801,18335066086016219275591681, 328113739821565326934355528908801, 13331506915406061943466437913131131863041, 70921573334045386691969365182528823266216247296000\ 1, 51979148071106263356020510647871238516054065671329\ 809222860801] |