n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 16 |
4 | 50 |
5 | 156 |
6 | 532 |
7 | 1856 |
8 | 6876 |
9 | 26200 |
10 | 104456 |
11 | 428352 |
12 | 1821976 |
13 | 7959056 |
14 | 35857200 |
15 | 165592576 |
16 | 785514512 |
17 | 3812387616 |
18 | 18948962656 |
19 | 96194028800 |
20 | 498931946016 |
21 | 2638959243712 |
22 | 14234346694976 |
[1,2,6,16,50,156,532,1856,6876,26200,104456, 428352,1821976,7959056,35857200,165592576, 785514512,3812387616,18948962656,96194028800, 498931946016,2638959243712,14234346694976] |