n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 44 |
4 | 298 |
5 | 2358 |
6 | 21154 |
7 | 211100 |
8 | 2313030 |
9 | 27566654 |
10 | 354806116 |
11 | 4903884712 |
12 | 72444584732 |
13 | 1139381007880 |
14 | 19012236634968 |
15 | 335560664081388 |
16 | 6247230709277958 |
17 | 122375974186267566 |
18 | 2516528486416495240 |
[1,2,8,44,298,2358,21154,211100,2313030,27566654, 354806116,4903884712,72444584732,1139381007880, 19012236634968,335560664081388,6247230709277958, 122375974186267566,2516528486416495240] |