The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 9 |
| 3 | 4 |
| 4 | 60 |
| 5 | 81 |
| 6 | 8 |
| 7 | 570 |
| 8 | 3600 |
| 9 | 729 |
| 10 | 15 |
| 11 | 6960 |
| 12 | 324900 |
| 13 | 216000 |
| 14 | 6084 |
| 15 | 28 |
| 16 | 104006 |
| 17 | 48441600 |
| 18 | 185193000 |
| 19 | 12067722 |
| 20 | 49284 |
| 21 | 51 |
| 22 | 1837752 |
| 23 | 10817248036 |
| 24 | 337153536000 |
| 25 | 98956027822 |
| 26 | 648144348 |
| 27 | 386884 |
| 28 | 92 |
| 29 | 37478718 |
| 30 | 3377332413504 |
| 31 | 1125058699232216 |
[2,9,4,60,81,8,570,3600,729,15,6960,324900,216000, 6084,28,104006,48441600,185193000,12067722,49284, 51,1837752,10817248036,337153536000,98956027822, 648144348,386884,92,37478718,3377332413504, 1125058699232216] |