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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | -10 |
| 4 | 5 |
| 5 | 1 |
| 6 | 750 |
| 7 | -250 |
| 8 | 25 |
| 9 | 1 |
| 10 | -328125 |
| 11 | 93750 |
| 12 | -6250 |
| 13 | 125 |
| 14 | 1 |
| 15 | 779296875 |
| 16 | -205078125 |
| 17 | 11718750 |
| 18 | -156250 |
| 19 | 625 |
| 20 | 1 |
| 21 | -9741210937500 |
| 22 | 2435302734375 |
| 23 | -128173828125 |
| 24 | 1464843750 |
| 25 | -3906250 |
| 26 | 3125 |
| 27 | 1 |
| 28 | 630569458007812500 |
| 29 | -152206420898437500 |
| 30 | 7610321044921875 |
[1,1,1,-10,5,1,750,-250,25,1,-328125,93750,-6250, 125,1,779296875,-205078125,11718750,-156250,625,1, -9741210937500,2435302734375,-128173828125, 1464843750,-3906250,3125,1,630569458007812500, -152206420898437500,7610321044921875] |