The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2920 |
| 2 | 137642 |
| 3 | 6505867 |
| 4 | 307396791 |
| 5 | 14522811996 |
| 6 | 686136478104 |
| 7 | 32416955585740 |
| 8 | 1531558664946401 |
| 9 | 72359402605644368 |
| 10 | 3418663231755377792 |
| 11 | 161516789161897931030 |
| 12 | 7630957302185381871107 |
| 13 | 360529141480763613554961 |
[2920,137642,6505867,307396791,14522811996, 686136478104,32416955585740,1531558664946401, 72359402605644368,3418663231755377792, 161516789161897931030,7630957302185381871107, 360529141480763613554961] |