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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 18 |
| 3 | 482 |
| 4 | 33554 |
| 5 | 5688162 |
| 6 | 2266828306 |
| 7 | 2077710037986 |
| 8 | 4312607047919378 |
| 9 | 20026622857699101794 |
| 10 | 205970083615742633015314 |
| 11 | 4651396041100180736449396962 |
| 12 | 228932014511191529094605862938898 |
| 13 | 24398187888144654481778017293891600738 |
[1,2,18,482,33554,5688162,2266828306, 2077710037986,4312607047919378, 20026622857699101794,205970083615742633015314, 4651396041100180736449396962, 228932014511191529094605862938898, 24398187888144654481778017293891600738] |