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A010551 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 12 |
| 6 | 36 |
| 7 | 144 |
| 8 | 576 |
| 9 | 2880 |
| 10 | 14400 |
| 11 | 86400 |
| 12 | 518400 |
| 13 | 3628800 |
| 14 | 25401600 |
| 15 | 203212800 |
| 16 | 1625702400 |
| 17 | 14631321600 |
| 18 | 131681894400 |
| 19 | 1316818944000 |
| 20 | 13168189440000 |
| 21 | 144850083840000 |
| 22 | 1593350922240000 |
| 23 | 19120211066880000 |
| 24 | 229442532802560000 |
| 25 | 2982752926433280000 |
[1,1,1,2,4,12,36,144,576,2880,14400,86400,518400, 3628800,25401600,203212800,1625702400,14631321600, 131681894400,1316818944000,13168189440000, 144850083840000,1593350922240000, 19120211066880000,229442532802560000, 2982752926433280000] |