| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | -1 |
| 3 | 15 |
| 4 | -5 |
| 5 | 3 |
| 6 | 35 |
| 7 | -35 |
| 8 | 21 |
| 9 | -5 |
| 10 | 315 |
| 11 | -105 |
| 12 | 189 |
| 13 | -45 |
| 14 | 35 |
| 15 | 693 |
| 16 | -1155 |
| 17 | 693 |
| 18 | -495 |
| 19 | 385 |
| 20 | -63 |
| 21 | 3003 |
| 22 | -3003 |
| 23 | 9009 |
| 24 | -2145 |
| 25 | 5005 |
| 26 | -819 |
| 27 | 231 |
| 28 | 6435 |
| 29 | -15015 |
| 30 | 27027 |
| 31 | -32175 |
| 32 | 25025 |
| 33 | -12285 |
| 34 | 3465 |
| 35 | -429 |
| 36 | 109395 |
| 37 | -36465 |
| 38 | 153153 |
| 39 | -109395 |
| 40 | 425425 |
| 41 | -69615 |
| 42 | 58905 |
| 43 | -7293 |
| 44 | 6435 |
[1,3,-1,15,-5,3,35,-35,21,-5,315,-105,189,-45,35, 693,-1155,693,-495,385,-63,3003,-3003,9009,-2145, 5005,-819,231,6435,-15015,27027,-32175,25025, -12285,3465,-429,109395,-36465,153153,-109395, 425425,-69615,58905,-7293,6435] |