n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 13 |
6 | 63 |
7 | 399 |
8 | 3268 |
9 | 33496 |
10 | 412943 |
11 | 5883727 |
12 | 94159721 |
13 | 1661723296 |
14 | 31954666517 |
15 | 663988090257 |
16 | 14814445040728 |
[0,0,1,1,3,13,63,399,3268,33496,412943,5883727, 94159721,1661723296,31954666517,663988090257, 14814445040728] |