n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 45 |
6 | 225 |
7 | 1575 |
8 | 11025 |
9 | 99225 |
10 | 893024 |
11 | 9823264 |
12 | 108051897 |
13 | 1404674661 |
14 | 18256733309 |
15 | 273850999635 |
16 | 4104997257175 |
17 | 69784953371975 |
18 | 1184628370304553 |
19 | 22507939035786507 |
20 | 426574822311932257 |
21 | 8958071268550577397 |
22 | 187401362296416433302 |
[1,1,1,3,9,45,225,1575,11025,99225,893024,9823264, 108051897,1404674661,18256733309,273850999635, 4104997257175,69784953371975,1184628370304553, 22507939035786507,426574822311932257, 8958071268550577397,187401362296416433302] |