n | a(n) |
---|---|
2 | 0 |
3 | 2 |
4 | 12 |
5 | 58 |
6 | 300 |
7 | 1682 |
8 | 10332 |
9 | 69298 |
10 | 505500 |
11 | 3990362 |
12 | 33925452 |
13 | 309248938 |
14 | 3010070700 |
15 | 31167995042 |
16 | 342164637372 |
17 | 3970297978978 |
18 | 48558251523900 |
19 | 624386836023722 |
20 | 8421511353298092 |
21 | 118891756573779418 |
22 | 1753452275441153100 |
23 | 26967372781086764402 |
[0,2,12,58,300,1682,10332,69298,505500,3990362, 33925452,309248938,3010070700,31167995042, 342164637372,3970297978978,48558251523900, 624386836023722,8421511353298092, 118891756573779418,1753452275441153100, 26967372781086764402] |