n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 20 |
4 | 66 |
5 | 222 |
6 | 750 |
7 | 2536 |
8 | 8578 |
9 | 29018 |
10 | 98166 |
11 | 332092 |
12 | 1123458 |
13 | 3800630 |
14 | 12857438 |
15 | 43496400 |
16 | 147147266 |
17 | 497795634 |
18 | 1684030566 |
19 | 5697034596 |
20 | 19272929986 |
21 | 65199855118 |
22 | 220569529934 |
23 | 746181374904 |
24 | 2524313509762 |
[2,6,20,66,222,750,2536,8578,29018,98166,332092, 1123458,3800630,12857438,43496400,147147266, 497795634,1684030566,5697034596,19272929986, 65199855118,220569529934,746181374904, 2524313509762] |