n | a(n) |
---|---|
1 | 8 |
2 | 47 |
3 | 230 |
4 | 1235 |
5 | 6504 |
6 | 34224 |
7 | 180404 |
8 | 950451 |
9 | 5007796 |
10 | 26385348 |
11 | 139020417 |
12 | 732477787 |
13 | 3859315404 |
14 | 20334154462 |
15 | 107137610499 |
16 | 564492004530 |
17 | 2974223725585 |
18 | 15670738828479 |
19 | 82566773061608 |
20 | 435031946402290 |
[8,47,230,1235,6504,34224,180404,950451,5007796, 26385348,139020417,732477787,3859315404, 20334154462,107137610499,564492004530, 2974223725585,15670738828479,82566773061608, 435031946402290] |