n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 10 |
6 | 24 |
7 | 65 |
8 | 171 |
9 | 482 |
10 | 1338 |
11 | 3868 |
12 | 11110 |
13 | 32707 |
14 | 96137 |
15 | 287001 |
16 | 857577 |
17 | 2588794 |
18 | 7830730 |
19 | 23854028 |
20 | 72840384 |
21 | 223557060 |
22 | 687811608 |
23 | 2124300494 |
24 | 6576110024 |
25 | 20418808851 |
26 | 63534855143 |
27 | 198178318008 |
28 | 619338524116 |
[1,1,2,4,10,24,65,171,482,1338,3868,11110,32707, 96137,287001,857577,2588794,7830730,23854028, 72840384,223557060,687811608,2124300494, 6576110024,20418808851,63534855143,198178318008, 619338524116] |