n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 36 |
4 | 210 |
5 | 1225 |
6 | 7140 |
7 | 41616 |
8 | 242556 |
9 | 1413721 |
10 | 8239770 |
11 | 48024900 |
12 | 279909630 |
13 | 1631432881 |
14 | 9508687656 |
15 | 55420693056 |
16 | 323015470680 |
17 | 1882672131025 |
18 | 10973017315470 |
19 | 63955431761796 |
20 | 372759573255306 |
21 | 2172602007770041 |
[0,1,6,36,210,1225,7140,41616,242556,1413721, 8239770,48024900,279909630,1631432881,9508687656, 55420693056,323015470680,1882672131025, 10973017315470,63955431761796,372759573255306, 2172602007770041] |