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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 34 |
| 4 | 55 |
| 5 | 21 |
| 6 | 21 |
| 7 | -1 |
| 8 | 144 |
| 9 | 55 |
| 10 | 55 |
| 11 | -1 |
| 12 | 377 |
| 13 | 987 |
| 14 | 6765 |
| 15 | 2584 |
| 16 | 2584 |
| 17 | -1 |
| 18 | 2584 |
| 19 | 610 |
| 20 | 987 |
| 21 | 6765 |
| 22 | 46368 |
| 23 | -1 |
| 24 | 75025 |
| 25 | 377 |
| 26 | 14930352 |
| 27 | -1 |
| 28 | 317811 |
| 29 | 6765 |
| 30 | 832040 |
| 31 | 14930352 |
| 32 | 6765 |
| 33 | -1 |
| 34 | 102334155 |
| 35 | -1 |
| 36 | 4181 |
| 37 | -1 |
| 38 | 317811 |
| 39 | -1 |
| 40 | 6765 |
| 41 | 987 |
| 42 | 701408733 |
| 43 | -1 |
| 44 | 1548008755920 |
| 45 | -1 |
| 46 | 2178309 |
| 47 | -1 |
| 48 | 225851433717 |
[0,1,3,34,55,21,21,-1,144,55,55,-1,377,987,6765, 2584,2584,-1,2584,610,987,6765,46368,-1,75025,377, 14930352,-1,317811,6765,832040,14930352,6765,-1, 102334155,-1,4181,-1,317811,-1,6765,987,701408733, -1,1548008755920,-1,2178309,-1,225851433717] |