n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 82 |
6 | 231 |
7 | 380 |
8 | 2990 |
9 | 20954 |
10 | 40953 |
11 | 42852 |
12 | 182492 |
13 | 859647 |
14 | 8039644 |
15 | 11990003 |
16 | 78269808 |
17 | 3263358159 |
18 | 6941215856 |
[1,2,4,12,82,231,380,2990,20954,40953,42852, 182492,859647,8039644,11990003,78269808, 3263358159,6941215856] |