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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 16 |
| 2 | 4096 |
| 3 | 2985984 |
| 4 | 4294967296 |
| 5 | 10240000000000 |
| 6 | 36520347436056576 |
| 7 | 182059119829942534144 |
| 8 | 1208925819614629174706176 |
| 9 | 10314424798490535546171949056 |
| 10 | 109951162777600000000000000000000 |
| 11 | 1432052311740255546466984939315265536 |
[1,16,4096,2985984,4294967296,10240000000000, 36520347436056576,182059119829942534144, 1208925819614629174706176, 10314424798490535546171949056, 109951162777600000000000000000000, 1432052311740255546466984939315265536] |