n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 20 |
5 | 125 |
6 | 1022 |
7 | 10145 |
8 | 119240 |
9 | 1621625 |
10 | 25018202 |
11 | 431595485 |
12 | 8233157660 |
13 | 172077583925 |
14 | 3910293621782 |
15 | 95985774268025 |
16 | 2531103994315280 |
17 | 71356674948823025 |
18 | 2141700448802291762 |
[0,1,2,5,20,125,1022,10145,119240,1621625, 25018202,431595485,8233157660,172077583925, 3910293621782,95985774268025,2531103994315280, 71356674948823025,2141700448802291762] |