The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 28 |
| 4 | 36 |
| 5 | 120 |
| 6 | 1176 |
| 7 | 2016 |
| 8 | 3240 |
| 9 | 16320 |
| 10 | 25200 |
| 11 | 32640 |
| 12 | 73920 |
| 13 | 165600 |
| 14 | 259560 |
| 15 | 446040 |
| 16 | 738720 |
| 17 | 2031120 |
| 18 | 2096640 |
| 19 | 2162160 |
| 20 | 2795520 |
| 21 | 4193280 |
| 22 | 8386560 |
| 23 | 27561600 |
| 24 | 73926720 |
| 25 | 75897360 |
| 26 | 103672800 |
| 27 | 231221760 |
| 28 | 396506880 |
| 29 | 976510080 |
| 30 | 1088367840 |
| 31 | 1377048960 |
| 32 | 1464765120 |
[1,6,28,36,120,1176,2016,3240,16320,25200,32640, 73920,165600,259560,446040,738720,2031120,2096640, 2162160,2795520,4193280,8386560,27561600,73926720, 75897360,103672800,231221760,396506880,976510080, 1088367840,1377048960,1464765120] |