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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 75 |
| 4 | 14301 |
| 5 | 40870872 |
| 6 | 2163410250576 |
| 7 | 2525542278491543715 |
| 8 | 75742007488274337351844747 |
| 9 | 66712890687959224726994385259183993 |
| 10 | 1942822997098466460791474215498474580001684381 |
| 11 | 2080073366817374333366496031890682227244159986035768679984 |
[1,1,4,75,14301,40870872,2163410250576, 2525542278491543715,75742007488274337351844747, 66712890687959224726994385259183993, 1942822997098466460791474215498474580001684381, 20800733668173743333664960318906822272441599860357\ 68679984] |