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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | -128 |
| 3 | -5038848 |
| 4 | 140737488355328 |
| 5 | 5000000000000000000000000 |
| 6 | -354400937492545922690672153504784580608 |
| 7 | -72317557999158469111384459491956546088110808312359944192 |
| 8 | 57896044618658097711785492504343953926634992332820282019728792003956564819968 |
[0,-128,-5038848,140737488355328, 5000000000000000000000000, -354400937492545922690672153504784580608, -7231755799915846911138445949195654608811080831235\ 9944192, 57896044618658097711785492504343953926634992332820\ 282019728792003956564819968] |