n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 15 |
5 | 75 |
6 | 435 |
7 | 3045 |
8 | 24465 |
9 | 220185 |
10 | 2200905 |
11 | 24209955 |
12 | 290529855 |
13 | 3776888115 |
14 | 52876298475 |
15 | 793144477125 |
16 | 12690313661025 |
17 | 215735332237425 |
18 | 3883235945814225 |
19 | 73781482970470275 |
20 | 1475629660064134575 |
21 | 30988222861346826075 |
22 | 681740902935880863075 |
[1,1,1,3,15,75,435,3045,24465,220185,2200905, 24209955,290529855,3776888115,52876298475, 793144477125,12690313661025,215735332237425, 3883235945814225,73781482970470275, 1475629660064134575,30988222861346826075, 681740902935880863075] |