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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 544 |
| 3 | 29889 |
| 4 | 526336 |
| 5 | 4890625 |
| 6 | 30256416 |
| 7 | 141296449 |
| 8 | 537001984 |
| 9 | 1743657921 |
| 10 | 5000500000 |
| 11 | 12969598081 |
| 12 | 30960175104 |
| 13 | 68931659329 |
| 14 | 144631092256 |
| 15 | 288330890625 |
| 16 | 549764202496 |
| 17 | 1008009019009 |
| 18 | 1785250619424 |
| 19 | 3065556651841 |
[0,1,544,29889,526336,4890625,30256416,141296449, 537001984,1743657921,5000500000,12969598081, 30960175104,68931659329,144631092256,288330890625, 549764202496,1008009019009,1785250619424, 3065556651841] |