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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 335 |
| 4 | 11508322 |
| 5 | 1324603148183 |
| 6 | 404760320241653655 |
| 7 | 282780723811372935744420 |
[0,1,335,11508322,1324603148183, 404760320241653655,282780723811372935744420] |