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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | -7 |
| 4 | -58 |
| 5 | 369 |
| 6 | 4572 |
| 7 | -40188 |
| 8 | -618694 |
| 9 | 6915257 |
| 10 | 123744242 |
| 11 | -1683380975 |
| 12 | -34017509348 |
| 13 | 546799381140 |
| 14 | 12298020900128 |
| 15 | -228437416454904 |
| 16 | -5666681561083638 |
| 17 | 119532757362516473 |
| 18 | 3247637352945151374 |
| 19 | -76715605444589999941 |
| 20 | -2268946268485834353378 |
[1,1,2,-7,-58,369,4572,-40188,-618694,6915257, 123744242,-1683380975,-34017509348,546799381140, 12298020900128,-228437416454904,-5666681561083638, 119532757362516473,3247637352945151374, -76715605444589999941,-2268946268485834353378] |