n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 25 |
3 | 129 |
4 | 665 |
5 | 3425 |
6 | 17641 |
7 | 90865 |
8 | 468025 |
9 | 2410689 |
10 | 12416905 |
11 | 63956625 |
12 | 329425881 |
13 | 1696797025 |
14 | 8739811625 |
15 | 45016761649 |
16 | 231870996345 |
17 | 1194314228225 |
18 | 6151638187721 |
19 | 31685674923985 |
20 | 163205631532825 |
[1,5,25,129,665,3425,17641,90865,468025,2410689, 12416905,63956625,329425881,1696797025,8739811625, 45016761649,231870996345,1194314228225, 6151638187721,31685674923985,163205631532825] |