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| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 3020 |
| 3 | 35874 |
| 4 | 427680 |
| 5 | 5098640 |
| 6 | 60725856 |
| 7 | 723344402 |
| 8 | 8617376624 |
| 9 | 102659701914 |
| 10 | 1222955615632 |
| 11 | 14568798764580 |
| 12 | 173556031634952 |
| 13 | 2067546134560766 |
| 14 | 24630307231347920 |
| 15 | 293416564842646058 |
[256,3020,35874,427680,5098640,60725856,723344402, 8617376624,102659701914,1222955615632, 14568798764580,173556031634952,2067546134560766, 24630307231347920,293416564842646058] |