n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 23 |
5 | 103 |
6 | 513 |
7 | 2760 |
8 | 15741 |
9 | 93944 |
10 | 581303 |
11 | 3704045 |
12 | 24180340 |
13 | 161082639 |
14 | 1091681427 |
15 | 7508269793 |
16 | 52302594344 |
17 | 368422746908 |
18 | 2620789110712 |
19 | 18806093326963 |
20 | 136000505625886 |
21 | 990406677136685 |
22 | 7258100272108212 |
[1,1,2,6,23,103,513,2760,15741,93944,581303, 3704045,24180340,161082639,1091681427,7508269793, 52302594344,368422746908,2620789110712, 18806093326963,136000505625886,990406677136685, 7258100272108212] |