Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 976 |
5 | 18510 |
6 | 201528 |
7 | 1232448 |
8 | 5637824 |
9 | 20502396 |
10 | 63720920 |
11 | 174647286 |
12 | 434439792 |
13 | 997037470 |
14 | 2141831160 |
15 | 4348204020 |
16 | 8412482304 |
17 | 15605151496 |
18 | 27903377016 |
19 | 48291880442 |
20 | 81188237680 |
21 | 132977239290 |
22 | 212739639640 |
[0,0,0,976,18510,201528,1232448,5637824,20502396, 63720920,174647286,434439792,997037470,2141831160, 4348204020,8412482304,15605151496,27903377016, 48291880442,81188237680,132977239290,212739639640] |