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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 3 |
| 3 | -36 |
| 4 | -155 |
| 5 | 474 |
| 6 | 1127 |
| 7 | -1992 |
| 8 | -1719 |
| 9 | -4810 |
| 10 | -31669 |
| 11 | 109332 |
| 12 | 286637 |
| 13 | -596974 |
| 14 | -904785 |
| 15 | 449136 |
| 16 | -3218287 |
| 17 | 16156782 |
| 18 | 50232979 |
| 19 | -121747380 |
| 20 | -233735691 |
| 21 | 309853258 |
| 22 | 15768823 |
| 23 | 1624290984 |
| 24 | 6853579225 |
| 25 | -19712646746 |
| 26 | -44873974053 |
| 27 | 79998871428 |
| 28 | 90434035261 |
[1,-2,3,-36,-155,474,1127,-1992,-1719,-4810, -31669,109332,286637,-596974,-904785,449136, -3218287,16156782,50232979,-121747380,-233735691, 309853258,15768823,1624290984,6853579225, -19712646746,-44873974053,79998871428,90434035261] |