The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 3 |
| 4 | 24 |
| 5 | 125 |
| 6 | 576 |
| 7 | 3136 |
| 8 | 24752 |
| 9 | 242280 |
| 10 | 2421000 |
| 11 | 23568743 |
| 12 | 230156136 |
| 13 | 2370756505 |
| 14 | 26664718080 |
| 15 | 326641069815 |
| 16 | 4243004068192 |
| 17 | 57065900282730 |
| 18 | 787656999701016 |
| 19 | 11193821784313606 |
| 20 | 165023822310642520 |
| 21 | 2535785869709189307 |
| 22 | 40583218821499596176 |
[1,0,0,3,24,125,576,3136,24752,242280,2421000, 23568743,230156136,2370756505,26664718080, 326641069815,4243004068192,57065900282730, 787656999701016,11193821784313606, 165023822310642520,2535785869709189307, 40583218821499596176] |