n | a(n) |
---|---|
1 | 7 |
2 | 28 |
3 | 112 |
4 | 462 |
5 | 1904 |
6 | 7868 |
7 | 32531 |
8 | 134517 |
9 | 556259 |
10 | 2300219 |
11 | 9511719 |
12 | 39332200 |
13 | 162643507 |
14 | 672550879 |
15 | 2781080236 |
16 | 11500107101 |
17 | 47554350602 |
18 | 196643061212 |
19 | 813143132135 |
20 | 3362446402726 |
21 | 13904127534002 |
22 | 57495269615906 |
[7,28,112,462,1904,7868,32531,134517,556259, 2300219,9511719,39332200,162643507,672550879, 2781080236,11500107101,47554350602,196643061212, 813143132135,3362446402726,13904127534002, 57495269615906] |