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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 50 |
| 2 | 906 |
| 3 | 247986 |
| 4 | 4072138 |
| 5 | 1059204274 |
| 6 | 272900475786 |
| 7 | 17953590946285746 |
| 8 | 287705670922216138 |
| 9 | 73724537815637830834 |
| 10 | 18880972926031430339466 |
| 11 | 1237678872789190922262530226 |
| 12 | 316876593058175709191975346890 |
[2,50,906,247986,4072138,1059204274,272900475786, 17953590946285746,287705670922216138, 73724537815637830834,18880972926031430339466, 1237678872789190922262530226, 316876593058175709191975346890] |