The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 2 |
| 3 | 12 |
| 4 | 3 |
| 5 | 15 |
| 6 | 60 |
| 7 | 840 |
| 8 | 105 |
| 9 | 630 |
| 10 | 630 |
| 11 | 13860 |
| 12 | 6930 |
| 13 | 180180 |
| 14 | 360360 |
| 15 | 144144 |
| 16 | 9009 |
| 17 | 306306 |
| 18 | 306306 |
| 19 | 11639628 |
| 20 | 14549535 |
| 21 | 14549535 |
| 22 | 58198140 |
| 23 | 2677114440 |
| 24 | 334639305 |
| 25 | 3346393050 |
[1,2,2,12,3,15,60,840,105,630,630,13860,6930, 180180,360360,144144,9009,306306,306306,11639628, 14549535,14549535,58198140,2677114440,334639305, 3346393050] |