n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 6 |
5 | 20 |
6 | 80 |
7 | 350 |
8 | 1750 |
9 | 10080 |
10 | 64512 |
11 | 450912 |
12 | 3438204 |
13 | 28471872 |
14 | 253913088 |
15 | 2424193200 |
16 | 24687555750 |
17 | 267199961600 |
18 | 3062092267520 |
19 | 37037541651968 |
20 | 471565937953396 |
21 | 6304419553216512 |
22 | 88298062293762048 |
23 | 1292879475255280640 |
24 | 19753693667117055100 |
[1,1,2,3,6,20,80,350,1750,10080,64512,450912, 3438204,28471872,253913088,2424193200,24687555750, 267199961600,3062092267520,37037541651968, 471565937953396,6304419553216512, 88298062293762048,1292879475255280640, 19753693667117055100] |