n | a(n) |
---|---|
2 | 1 |
3 | 6 |
4 | 36 |
5 | 210 |
6 | 1221 |
7 | 7098 |
8 | 41328 |
9 | 241128 |
10 | 1409895 |
11 | 8260934 |
12 | 48497064 |
13 | 285219090 |
14 | 1680166215 |
15 | 9912297150 |
16 | 58558256496 |
17 | 346371955776 |
18 | 2051126447742 |
19 | 12158963346852 |
20 | 72147074769640 |
21 | 428476010502582 |
22 | 2546776668682323 |
23 | 15149061841758174 |
24 | 90175327717962024 |
[1,6,36,210,1221,7098,41328,241128,1409895, 8260934,48497064,285219090,1680166215,9912297150, 58558256496,346371955776,2051126447742, 12158963346852,72147074769640,428476010502582, 2546776668682323,15149061841758174, 90175327717962024] |