Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 2 |
4 | 6 |
5 | 24 |
6 | 84 |
7 | 312 |
8 | 1140 |
9 | 4248 |
10 | 15852 |
11 | 59688 |
12 | 225624 |
13 | 857424 |
14 | 3270216 |
15 | 12518472 |
16 | 48062520 |
17 | 185034360 |
18 | 714038448 |
19 | 2761343064 |
20 | 10698992304 |
21 | 41525207448 |
22 | 161418403008 |
23 | 628356425856 |
24 | 2449152822168 |
25 | 9557303840184 |
[0,0,2,6,24,84,312,1140,4248,15852,59688,225624, 857424,3270216,12518472,48062520,185034360, 714038448,2761343064,10698992304,41525207448, 161418403008,628356425856,2449152822168, 9557303840184] |