Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 12 |
5 | 30 |
6 | 408 |
7 | 1012 |
8 | 17920 |
9 | 45600 |
10 | 1059380 |
11 | 2730756 |
12 | 78115884 |
13 | 203235032 |
14 | 6917206576 |
15 | 18113945256 |
16 | 714851008512 |
17 | 1881039165696 |
18 | 84449819514060 |
19 | 223049005408900 |
20 | 11225502116862880 |
21 | 29736777118603962 |
22 | 1658138369930988088 |
23 | 4403069737450280832 |
[0,1,2,12,30,408,1012,17920,45600,1059380,2730756, 78115884,203235032,6917206576,18113945256, 714851008512,1881039165696,84449819514060, 223049005408900,11225502116862880, 29736777118603962,1658138369930988088, 4403069737450280832] |