n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 35 |
4 | 240 |
5 | 3003 |
6 | 26880 |
7 | 415701 |
8 | 4435200 |
9 | 79676025 |
10 | 968647680 |
11 | 19535112675 |
12 | 263472168960 |
13 | 5837993287875 |
14 | 85816649318400 |
15 | 2058476433304725 |
16 | 32567418416332800 |
17 | 836589039864843825 |
18 | 14112547980410880000 |
[1,4,35,240,3003,26880,415701,4435200,79676025, 968647680,19535112675,263472168960,5837993287875, 85816649318400,2058476433304725,32567418416332800, 836589039864843825,14112547980410880000] |