n | a(n) |
---|---|
1 | 0 |
2 | 4 |
3 | 175 |
4 | 3324 |
5 | 42469 |
6 | 429120 |
7 | 3711027 |
8 | 28723640 |
9 | 204598130 |
10 | 1366223880 |
11 | 8664086470 |
12 | 52673351080 |
13 | 309164754285 |
14 | 1761471681568 |
15 | 9783594370723 |
16 | 53154274959360 |
17 | 283267669144390 |
18 | 1484104565936920 |
19 | 7658877239935362 |
20 | 38993558097982312 |
21 | 196127054929939810 |
[0,4,175,3324,42469,429120,3711027,28723640, 204598130,1366223880,8664086470,52673351080, 309164754285,1761471681568,9783594370723, 53154274959360,283267669144390,1484104565936920, 7658877239935362,38993558097982312, 196127054929939810] |