n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 65 |
6 | 293 |
7 | 1807 |
8 | 12946 |
9 | 106475 |
10 | 972260 |
11 | 9858553 |
12 | 109451903 |
13 | 1323071345 |
14 | 17398667717 |
15 | 247055196932 |
16 | 3753507625272 |
17 | 60680317203979 |
18 | 1043036844360792 |
19 | 18969267205680868 |
20 | 364107881070036688 |
21 | 7366172106829696356 |
22 | 156467911373737550264 |
[1,1,2,5,16,65,293,1807,12946,106475,972260, 9858553,109451903,1323071345,17398667717, 247055196932,3753507625272,60680317203979, 1043036844360792,18969267205680868, 364107881070036688,7366172106829696356, 156467911373737550264] |