| n | a(n) |
|---|---|
| 1 | -1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 1 |
| 6 | 13 |
| 7 | 1 |
| 8 | 27 |
| 9 | 8 |
| 10 | 91 |
| 11 | 1 |
| 12 | 1213 |
| 13 | 1 |
| 14 | 505 |
| 15 | 1919 |
| 16 | 2955 |
| 17 | 1 |
| 18 | 24557 |
| 19 | 1 |
| 20 | 1136313 |
| 21 | 34943 |
| 22 | 12277 |
| 23 | 1 |
| 24 | 65978519 |
| 25 | 624 |
| 26 | 57331 |
| 27 | 58528 |
| 28 | 195948483 |
| 29 | 1 |
| 30 | 1052424027703 |
| 31 | 1 |
| 32 | 77010795 |
| 33 | 7085759 |
| 34 | 1179631 |
| 35 | 37497599 |
| 36 | 7047825380633 |
| 37 | 1 |
| 38 | 5242861 |
| 39 | 89281919 |
| 40 | 355723139681937 |
[-1,1,1,3,1,13,1,27,8,91,1,1213,1,505,1919,2955,1, 24557,1,1136313,34943,12277,1,65978519,624,57331, 58528,195948483,1,1052424027703,1,77010795, 7085759,1179631,37497599,7047825380633,1,5242861, 89281919,355723139681937] |