n | a(n) |
---|---|
1 | 2 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 18 |
6 | 63 |
7 | 232 |
8 | 868 |
9 | 3338 |
10 | 13105 |
11 | 52270 |
12 | 210822 |
13 | 859528 |
14 | 3535424 |
15 | 14654628 |
16 | 61150659 |
17 | 256674992 |
18 | 1083008336 |
19 | 4590945532 |
20 | 19542842196 |
21 | 83504907276 |
22 | 358032884540 |
23 | 1539885406796 |
24 | 6641914100221 |
[2,1,2,6,18,63,232,868,3338,13105,52270,210822, 859528,3535424,14654628,61150659,256674992, 1083008336,4590945532,19542842196,83504907276, 358032884540,1539885406796,6641914100221] |