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| n | a(n) |
|---|---|
| 0 | 290 |
| 1 | 78 |
| 2 | 18 |
| 3 | 6 |
| 4 | 3 |
| 5 | 36 |
| 6 | 21 |
| 7 | 19 |
| 8 | 7 |
| 9 | 8 |
| 10 | 4 |
| 11 | 2 |
| 12 | 1 |
| 13 | -1 |
| 14 | -1 |
| 15 | -1 |
| 16 | -1 |
| 17 | -1 |
| 18 | -1 |
| 19 | -1 |
| 20 | -1 |
[290,78,18,6,3,36,21,19,7,8,4,2,1,-1,-1,-1,-1,-1, -1,-1,-1] |