n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 13 |
7 | 32 |
8 | 85 |
9 | 246 |
10 | 757 |
11 | 2480 |
12 | 8537 |
13 | 30858 |
14 | 116229 |
15 | 455668 |
16 | 1850417 |
17 | 7774102 |
18 | 33679941 |
19 | 150291472 |
20 | 689170529 |
21 | 3244125554 |
22 | 15649195077 |
23 | 77287580604 |
24 | 390271482145 |
25 | 2013310674830 |
26 | 10599283282021 |
[0,0,1,2,3,6,13,32,85,246,757,2480,8537,30858, 116229,455668,1850417,7774102,33679941,150291472, 689170529,3244125554,15649195077,77287580604, 390271482145,2013310674830,10599283282021] |