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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 0 |
| 3 | 99 |
| 4 | -270 |
| 5 | 2430 |
| 6 | -10287 |
| 7 | 105462 |
| 8 | -750141 |
| 9 | 5702481 |
| 10 | -42623901 |
| 11 | 347424633 |
| 12 | -2779077762 |
| 13 | 22353287634 |
| 14 | -181730796723 |
| 15 | 1493711042589 |
| 16 | -12321529794261 |
| 17 | 102125312638713 |
| 18 | -850797139405887 |
| 19 | 7120067746384863 |
| 20 | -59800770201017934 |
| 21 | 503922807927384129 |
| 22 | -4259721779079782751 |
[1,3,0,99,-270,2430,-10287,105462,-750141,5702481, -42623901,347424633,-2779077762,22353287634, -181730796723,1493711042589,-12321529794261, 102125312638713,-850797139405887,7120067746384863, -59800770201017934,503922807927384129, -4259721779079782751] |