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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 82 |
| 3 | 6725 |
| 4 | 551532 |
| 5 | 45232349 |
| 6 | 3709604150 |
| 7 | 304232772649 |
| 8 | 24950796961368 |
| 9 | 2046269583604825 |
| 10 | 167819056652557018 |
| 11 | 13763208915093280301 |
| 12 | 1128750950094301541700 |
| 13 | 92571341116647819699701 |
| 14 | 7591978722515215516917182 |
| 15 | 622634826587364320206908625 |
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