The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 6 |
| 3 | 48 |
| 4 | 168 |
| 5 | 480 |
| 6 | 966 |
| 7 | 2016 |
| 8 | 3360 |
| 9 | 5616 |
| 10 | 8550 |
| 11 | 13200 |
| 12 | 17832 |
| 13 | 26208 |
| 14 | 34566 |
| 15 | 45840 |
| 16 | 59520 |
| 17 | 78336 |
| 18 | 95526 |
| 19 | 123120 |
| 20 | 147240 |
| 21 | 181776 |
| 22 | 219846 |
| 23 | 267168 |
| 24 | 307488 |
| 25 | 372000 |
| 26 | 433446 |
| 27 | 505440 |
| 28 | 580776 |
| 29 | 682080 |
| 30 | 762150 |
| 31 | 892800 |
| 32 | 999936 |
| 33 | 1138368 |
| 34 | 1284486 |
[0,6,48,168,480,966,2016,3360,5616,8550,13200, 17832,26208,34566,45840,59520,78336,95526,123120, 147240,181776,219846,267168,307488,372000,433446, 505440,580776,682080,762150,892800,999936,1138368, 1284486] |