n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 4 |
4 | 26 |
5 | 240 |
6 | 4063 |
7 | 110576 |
8 | 5046694 |
9 | 390350577 |
10 | 51445991632 |
11 | 11496127271424 |
12 | 4348804724288989 |
13 | 2784306483759192151 |
14 | 3019459887601073667024 |
15 | 5548682373331641079067391 |
16 | 17274304412990968236505863156 |
[0,2,4,26,240,4063,110576,5046694,390350577, 51445991632,11496127271424,4348804724288989, 2784306483759192151,3019459887601073667024, 5548682373331641079067391, 17274304412990968236505863156] |