n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 7 |
4 | 43 |
5 | 154 |
6 | 668 |
7 | 2214 |
8 | 6876 |
9 | 16864 |
10 | 41970 |
11 | 94710 |
12 | 202027 |
13 | 429733 |
14 | 889207 |
15 | 1549511 |
16 | 3238700 |
17 | 5053317 |
18 | 8502061 |
19 | 15583775 |
20 | 25070899 |
21 | 40588284 |
22 | 63604514 |
[0,1,7,43,154,668,2214,6876,16864,41970,94710, 202027,429733,889207,1549511,3238700,5053317, 8502061,15583775,25070899,40588284,63604514] |