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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 1000000000000 |
| 3 | 5 |
| 4 | 2 |
| 5 | 0 |
| 6 | 9 |
| 7 | 20 |
| 8 | 8 |
| 9 | 3 |
| 10 | -1 |
| 11 | -1 |
| 12 | 1000 |
| 13 | 1000 |
| 14 | 1 |
| 15 | 0 |
| 16 | 7 |
| 17 | 4 |
| 18 | 0 |
| 19 | 3 |
| 20 | 3 |
| 21 | 1 |
| 22 | 20 |
| 23 | -1 |
| 24 | 2 |
| 25 | -1 |
| 26 | 0 |
[4,1000000000000,5,2,0,9,20,8,3,-1,-1,1000,1000,1, 0,7,4,0,3,3,1,20,-1,2,-1,0] |