n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 7 |
9 | 25 |
10 | 45 |
11 | 79 |
12 | 171 |
13 | 569 |
14 | 1763 |
15 | 6023 |
16 | 22593 |
17 | 106741 |
18 | 481403 |
19 | 2734225 |
20 | 13695379 |
21 | 86954465 |
[1,1,1,1,1,1,1,7,25,45,79,171,569,1763,6023,22593, 106741,481403,2734225,13695379,86954465] |