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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -8 |
| 2 | 32 |
| 3 | -512 |
| 4 | 4608 |
| 5 | -73728 |
| 6 | 819200 |
| 7 | -13107200 |
| 8 | 160563200 |
| 9 | -2569011200 |
| 10 | 33294385152 |
| 11 | -532710162432 |
| 12 | 7161992183808 |
| 13 | -114591874940928 |
| 14 | 1580900152246272 |
| 15 | -25294402435940352 |
| 16 | 355702534255411200 |
| 17 | -5691240548086579200 |
| 18 | 81223136710964019200 |
| 19 | -1299570187375424307200 |
| 20 | 18765793505701126995968 |
[1,-8,32,-512,4608,-73728,819200,-13107200, 160563200,-2569011200,33294385152,-532710162432, 7161992183808,-114591874940928,1580900152246272, -25294402435940352,355702534255411200, -5691240548086579200,81223136710964019200, -1299570187375424307200,18765793505701126995968] |