n | a(n) |
---|---|
1 | 40 |
2 | 1600 |
3 | 13230 |
4 | 80511 |
5 | 417425 |
6 | 1726758 |
7 | 6835345 |
8 | 24832818 |
9 | 86006178 |
10 | 290773660 |
11 | 952221873 |
12 | 3079379225 |
13 | 9827714792 |
14 | 31055966425 |
15 | 97631157960 |
16 | 305161540736 |
17 | 950767241358 |
18 | 2954422566171 |
19 | 9160209168881 |
20 | 28362651790230 |
21 | 87706947406905 |
[40,1600,13230,80511,417425,1726758,6835345, 24832818,86006178,290773660,952221873,3079379225, 9827714792,31055966425,97631157960,305161540736, 950767241358,2954422566171,9160209168881, 28362651790230,87706947406905] |