n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 35 |
6 | 153 |
7 | 791 |
8 | 4597 |
9 | 29988 |
10 | 215804 |
11 | 1697291 |
12 | 14457059 |
13 | 132392971 |
14 | 1295346365 |
15 | 13468653637 |
16 | 148142236784 |
17 | 1716782858995 |
18 | 20889118889021 |
[1,1,1,3,9,35,153,791,4597,29988,215804,1697291, 14457059,132392971,1295346365,13468653637, 148142236784,1716782858995,20889118889021] |