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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | -3 |
| 3 | 5 |
| 4 | -45 |
| 5 | 117 |
| 6 | -663 |
| 7 | 1989 |
| 8 | -49725 |
| 9 | 160225 |
| 10 | -1057485 |
| 11 | 3556995 |
| 12 | -48612265 |
| 13 | 168273225 |
| 14 | -1177912575 |
| 15 | 4161957765 |
| 16 | -237231592605 |
| 17 | 851242773465 |
| 18 | -6147864475025 |
| 19 | 22326455198775 |
| 20 | -325966245902115 |
| 21 | 1195209568307755 |
| 22 | -8801088639357105 |
| 23 | 32525762362841475 |
| 24 | -964930950097630425 |
[1,3,-3,5,-45,117,-663,1989,-49725,160225, -1057485,3556995,-48612265,168273225,-1177912575, 4161957765,-237231592605,851242773465, -6147864475025,22326455198775,-325966245902115, 1195209568307755,-8801088639357105, 32525762362841475,-964930950097630425] |