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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -3 |
| 3 | 6 |
| 4 | -8 |
| 5 | 5 |
| 6 | -7 |
| 7 | 70 |
| 8 | -72 |
| 9 | -1311 |
| 10 | 1309 |
| 11 | 49214 |
| 12 | -49216 |
| 13 | -2653547 |
| 14 | 2653545 |
| 15 | 196707438 |
| 16 | -196707440 |
| 17 | -19194804703 |
| 18 | 19194804701 |
| 19 | 2385684870742 |
| 20 | -2385684870744 |
| 21 | -367985503366779 |
| 22 | 367985503366777 |
| 23 | 68980888889771126 |
| 24 | -68980888889771128 |
[0,1,-3,6,-8,5,-7,70,-72,-1311,1309,49214,-49216, -2653547,2653545,196707438,-196707440, -19194804703,19194804701,2385684870742, -2385684870744,-367985503366779,367985503366777, 68980888889771126,-68980888889771128] |