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| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | -1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 6 |
| 6 | 9 |
| 7 | 36 |
| 8 | 40 |
| 9 | 200 |
| 10 | 205 |
| 11 | 1230 |
| 12 | 1236 |
| 13 | 8652 |
| 14 | 8659 |
| 15 | 69272 |
| 16 | 69280 |
| 17 | 623520 |
| 18 | 623529 |
| 19 | 6235290 |
| 20 | 6235300 |
| 21 | 68588300 |
| 22 | 68588311 |
| 23 | 823059732 |
| 24 | 823059744 |
| 25 | 10699776672 |
| 26 | 10699776685 |
| 27 | 149796873590 |
| 28 | 149796873604 |
| 29 | 2246953104060 |
| 30 | 2246953104075 |
| 31 | 35951249665200 |
| 32 | 35951249665216 |
[-1,-1,0,0,2,6,9,36,40,200,205,1230,1236,8652, 8659,69272,69280,623520,623529,6235290,6235300, 68588300,68588311,823059732,823059744,10699776672, 10699776685,149796873590,149796873604, 2246953104060,2246953104075,35951249665200, 35951249665216] |