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| n | a(n) |
|---|---|
| 0 | -2 |
| 1 | -1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 0 |
| 6 | 2 |
| 7 | 5 |
| 8 | 10 |
| 9 | 19 |
| 10 | 36 |
| 11 | 72 |
| 12 | 142 |
| 13 | 279 |
| 14 | 548 |
| 15 | 1077 |
| 16 | 2118 |
| 17 | 4164 |
| 18 | 8186 |
| 19 | 16093 |
| 20 | 31638 |
| 21 | 62199 |
| 22 | 122280 |
| 23 | 240396 |
| 24 | 472606 |
| 25 | 929119 |
| 26 | 1826600 |
| 27 | 3591001 |
| 28 | 7059722 |
| 29 | 13879048 |
| 30 | 27285490 |
| 31 | 53641861 |
| 32 | 105457122 |
| 33 | 207323243 |
| 34 | 407586764 |
| 35 | 801294480 |
| 36 | 1575303470 |
| 37 | 3096965079 |
| 38 | 6088473036 |
| 39 | 11969622829 |
[-2,-1,0,1,2,0,2,5,10,19,36,72,142,279,548,1077, 2118,4164,8186,16093,31638,62199,122280,240396, 472606,929119,1826600,3591001,7059722,13879048, 27285490,53641861,105457122,207323243,407586764, 801294480,1575303470,3096965079,6088473036, 11969622829] |