n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 105 |
6 | 675 |
7 | 4725 |
8 | 35805 |
9 | 322245 |
10 | 3236625 |
11 | 35602875 |
12 | 425872755 |
13 | 5536345815 |
14 | 77347084815 |
15 | 1160206272225 |
16 | 18403556596425 |
17 | 312860462139225 |
18 | 5643104418376425 |
19 | 107218983949152075 |
20 | 2136610763952639975 |
21 | 44868826043005439475 |
22 | 986129980012277775675 |
[1,1,2,6,21,105,675,4725,35805,322245,3236625, 35602875,425872755,5536345815,77347084815, 1160206272225,18403556596425,312860462139225, 5643104418376425,107218983949152075, 2136610763952639975,44868826043005439475, 986129980012277775675] |