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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 36 |
| 3 | 864 |
| 4 | 160000 |
| 5 | 1012500 |
| 6 | 5489031744 |
| 7 | 107943428096 |
| 8 | 80244904034304 |
| 9 | 605344514062500 |
| 10 | 259374246010000000000 |
| 11 | 10223233001492594688 |
| 12 | 207728067204059288762843136 |
| 13 | 33537450691014897397230824 |
| 14 | 53397858971547468000000000000 |
| 15 | 246512345193381888000000000000000 |
[1,2,36,864,160000,1012500,5489031744, 107943428096,80244904034304,605344514062500, 259374246010000000000,10223233001492594688, 207728067204059288762843136, 33537450691014897397230824, 53397858971547468000000000000, 246512345193381888000000000000000] |