The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 12 |
| 3 | 132 |
| 4 | 10032 |
| 5 | 1003200 |
| 6 | 100320000 |
| 7 | 10032000000 |
| 8 | 1003200000000 |
| 9 | 100320000000000 |
| 10 | 10032000000000000 |
| 11 | 1003200000000000000 |
| 12 | 100320000000000000000 |
| 13 | 10032000000000000000000 |
[2,12,132,10032,1003200,100320000,10032000000, 1003200000000,100320000000000,10032000000000000, 1003200000000000000,100320000000000000000, 10032000000000000000000] |