n | a(n) |
---|---|
1 | 7 |
2 | 49 |
3 | 230 |
4 | 1209 |
5 | 6475 |
6 | 34020 |
7 | 179097 |
8 | 944514 |
9 | 4978956 |
10 | 26241679 |
11 | 138316703 |
12 | 729070278 |
13 | 3842881010 |
14 | 20255521442 |
15 | 106765644778 |
16 | 562755120940 |
17 | 2966245831625 |
18 | 15634892911279 |
19 | 82410528967137 |
20 | 434380653636920 |
[7,49,230,1209,6475,34020,179097,944514,4978956, 26241679,138316703,729070278,3842881010, 20255521442,106765644778,562755120940, 2966245831625,15634892911279,82410528967137, 434380653636920] |