Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 4 |
3 | 18 |
4 | 48 |
5 | 180 |
6 | 1080 |
7 | 7056 |
8 | 44928 |
9 | 286416 |
10 | 1762560 |
11 | 10349856 |
12 | 60217344 |
13 | 356638464 |
14 | 2145709440 |
15 | 12976433280 |
16 | 78399995904 |
17 | 472093588224 |
18 | 2832561529344 |
19 | 16960580969472 |
20 | 101554796888064 |
21 | 608733733690368 |
22 | 3652526115938304 |
23 | 21926115464435712 |
24 | 131620960833896448 |
[0,4,18,48,180,1080,7056,44928,286416,1762560, 10349856,60217344,356638464,2145709440, 12976433280,78399995904,472093588224, 2832561529344,16960580969472,101554796888064, 608733733690368,3652526115938304, 21926115464435712,131620960833896448] |