n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 17 |
5 | 78 |
6 | 449 |
7 | 3060 |
8 | 23920 |
9 | 210930 |
10 | 2070941 |
11 | 22403815 |
12 | 264772350 |
13 | 3393900116 |
14 | 46897528867 |
15 | 694936109572 |
16 | 10992625733215 |
17 | 184875978240421 |
18 | 3294153794102035 |
19 | 61989985034465560 |
20 | 1228528794319408361 |
21 | 25575735809013137690 |
22 | 558016054014832095049 |
[1,1,2,5,17,78,449,3060,23920,210930,2070941, 22403815,264772350,3393900116,46897528867, 694936109572,10992625733215,184875978240421, 3294153794102035,61989985034465560, 1228528794319408361,25575735809013137690, 558016054014832095049] |