n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 5 |
4 | 25 |
5 | 65 |
6 | 325 |
7 | 1105 |
8 | 4225 |
9 | 5525 |
10 | 27625 |
11 | 71825 |
12 | 138125 |
13 | 160225 |
14 | 801125 |
15 | 2082925 |
16 | 4005625 |
17 | 5928325 |
18 | 29641625 |
19 | 77068225 |
20 | 148208125 |
21 | 243061325 |
22 | 1215306625 |
23 | 3159797225 |
24 | 6076533125 |
25 | 12882250225 |
26 | 53716552825 |
27 | 64411251125 |
[0,1,5,25,65,325,1105,4225,5525,27625,71825, 138125,160225,801125,2082925,4005625,5928325, 29641625,77068225,148208125,243061325,1215306625, 3159797225,6076533125,12882250225,53716552825, 64411251125] |