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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 560 |
| 3 | 92400 |
| 4 | 33633600 |
| 5 | 22870848000 |
| 6 | 26072766720000 |
| 7 | 46174869861120000 |
| 8 | 120054661638912000000 |
| 9 | 438679733628584448000000 |
| 10 | 2175851478797778862080000000 |
| 11 | 14240947928731462652313600000000 |
| 12 | 120136636726778618934917529600000000 |
| 13 | 1280656547507460077846220865536000000000 |
[1,10,560,92400,33633600,22870848000, 26072766720000,46174869861120000, 120054661638912000000,438679733628584448000000, 2175851478797778862080000000, 14240947928731462652313600000000, 120136636726778618934917529600000000, 1280656547507460077846220865536000000000] |