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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | -1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 3 |
| 7 | 3 |
| 8 | 7 |
| 9 | 13 |
| 10 | 19 |
| 11 | 29 |
| 12 | 49 |
| 13 | 81 |
| 14 | 129 |
| 15 | 207 |
| 16 | 337 |
| 17 | 547 |
| 18 | 883 |
| 19 | 1427 |
| 20 | 2311 |
| 21 | 3741 |
| 22 | 6051 |
| 23 | 9789 |
| 24 | 15841 |
| 25 | 25633 |
| 26 | 41473 |
| 27 | 67103 |
| 28 | 108577 |
| 29 | 175683 |
| 30 | 284259 |
| 31 | 459939 |
| 32 | 744199 |
| 33 | 1204141 |
| 34 | 1948339 |
| 35 | 3152477 |
| 36 | 5100817 |
| 37 | 8253297 |
| 38 | 13354113 |
| 39 | 21607407 |
| 40 | 34961521 |
| 41 | 56568931 |
[1,1,1,-1,1,3,3,3,7,13,19,29,49,81,129,207,337, 547,883,1427,2311,3741,6051,9789,15841,25633, 41473,67103,108577,175683,284259,459939,744199, 1204141,1948339,3152477,5100817,8253297,13354113, 21607407,34961521,56568931] |