n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 34 |
4 | 212 |
5 | 1488 |
6 | 11736 |
7 | 103248 |
8 | 1004832 |
9 | 10733760 |
10 | 124966080 |
11 | 1575797760 |
12 | 21403457280 |
13 | 311623441920 |
14 | 4842481190400 |
15 | 80007869491200 |
16 | 1400671686758400 |
17 | 25902542427955200 |
18 | 504597366114508800 |
19 | 10328835149402112000 |
[1,6,34,212,1488,11736,103248,1004832,10733760, 124966080,1575797760,21403457280,311623441920, 4842481190400,80007869491200,1400671686758400, 25902542427955200,504597366114508800, 10328835149402112000] |