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| n | a(n) |
|---|---|
| 4 | 1 |
| 5 | -1 |
| 6 | 4 |
| 7 | -5 |
| 8 | 15 |
| 9 | -19 |
| 10 | 45 |
| 11 | -52 |
| 12 | 118 |
| 13 | -137 |
| 14 | 281 |
| 15 | -316 |
| 16 | 625 |
| 17 | -695 |
| 18 | 1331 |
| 19 | -1444 |
| 20 | 2696 |
| 21 | -2907 |
| 22 | 5308 |
| 23 | -5640 |
| 24 | 10122 |
| 25 | -10650 |
| 26 | 18845 |
| 27 | -19628 |
| 28 | 34241 |
| 29 | -35378 |
| 30 | 61036 |
| 31 | -62524 |
| 32 | 106783 |
| 33 | -108593 |
| 34 | 183799 |
| 35 | -185646 |
| 36 | 311625 |
| 37 | -312800 |
| 38 | 521232 |
| 39 | -520044 |
| 40 | 860728 |
| 41 | -854151 |
| 42 | 1404871 |
| 43 | -1386868 |
| 44 | 2267960 |
| 45 | -2228161 |
[1,-1,4,-5,15,-19,45,-52,118,-137,281,-316,625, -695,1331,-1444,2696,-2907,5308,-5640,10122, -10650,18845,-19628,34241,-35378,61036,-62524, 106783,-108593,183799,-185646,311625,-312800, 521232,-520044,860728,-854151,1404871,-1386868, 2267960,-2228161] |