n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 24 |
6 | 62 |
7 | 156 |
8 | 406 |
9 | 1040 |
10 | 2714 |
11 | 7012 |
12 | 18322 |
13 | 47560 |
14 | 124358 |
15 | 323708 |
16 | 846766 |
17 | 2208032 |
18 | 5777330 |
19 | 15082372 |
20 | 39469786 |
[1,1,2,4,10,24,62,156,406,1040,2714,7012,18322, 47560,124358,323708,846766,2208032,5777330, 15082372,39469786] |