n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 66 |
5 | 360 |
6 | 1864 |
7 | 9358 |
8 | 45642 |
9 | 217590 |
10 | 1017626 |
11 | 4684896 |
12 | 21284488 |
13 | 95624666 |
14 | 425523864 |
15 | 1878025074 |
16 | 8229470812 |
17 | 35836393568 |
18 | 155196577484 |
19 | 668832795812 |
20 | 2869861291134 |
21 | 12266161148622 |
22 | 52243167132940 |
23 | 221803857150698 |
24 | 938974990229088 |
25 | 3964558585350392 |
[1,1,2,12,66,360,1864,9358,45642,217590,1017626, 4684896,21284488,95624666,425523864,1878025074, 8229470812,35836393568,155196577484,668832795812, 2869861291134,12266161148622,52243167132940, 221803857150698,938974990229088,3964558585350392] |