Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 0 |
4 | 2 |
5 | 10 |
6 | 0 |
7 | 8 |
8 | 24 |
9 | 72 |
10 | 116 |
11 | 336 |
12 | 1124 |
13 | 4056 |
14 | 12628 |
15 | 58984 |
16 | 263066 |
17 | 1124116 |
18 | 5388972 |
19 | 29219680 |
20 | 173696136 |
21 | 967249940 |
[1,0,0,2,10,0,8,24,72,116,336,1124,4056,12628, 58984,263066,1124116,5388972,29219680,173696136, 967249940] |