n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 12 |
5 | 41 |
6 | 152 |
7 | 685 |
8 | 3472 |
9 | 19921 |
10 | 126752 |
11 | 887765 |
12 | 6781632 |
13 | 56126201 |
14 | 500231552 |
15 | 4776869245 |
16 | 48656756992 |
17 | 526589630881 |
18 | 6034272215552 |
19 | 72989204937125 |
20 | 929327412759552 |
21 | 12424192360405961 |
22 | 174008703107274752 |
[1,1,2,5,12,41,152,685,3472,19921,126752,887765, 6781632,56126201,500231552,4776869245,48656756992, 526589630881,6034272215552,72989204937125, 929327412759552,12424192360405961, 174008703107274752] |