The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 60 |
| 5 | 120 |
| 6 | 360 |
| 7 | 2520 |
| 8 | 5040 |
| 9 | 55440 |
| 10 | 720720 |
| 11 | 1441440 |
| 12 | 4324320 |
| 13 | 21621600 |
| 14 | 367567200 |
| 15 | 6983776800 |
| 16 | 321253732800 |
| 17 | 6064949221531200 |
| 18 | 791245405339403414400 |
| 19 | 37188534050951960476800 |
| 20 | 581442729886633902054768000 |
[2,6,12,60,120,360,2520,5040,55440,720720,1441440, 4324320,21621600,367567200,6983776800, 321253732800,6064949221531200, 791245405339403414400,37188534050951960476800, 581442729886633902054768000] |