n | a(n) |
---|---|
0 | 0 |
1 | 6 |
2 | 40 |
3 | 218 |
4 | 1126 |
5 | 5726 |
6 | 28992 |
7 | 146642 |
8 | 741556 |
9 | 3749816 |
10 | 18961450 |
11 | 95880894 |
12 | 484833212 |
13 | 2451616864 |
14 | 12396892316 |
15 | 62686360476 |
16 | 316981037374 |
17 | 1602852315476 |
18 | 8105013367472 |
19 | 40983964057352 |
20 | 207240288658392 |
[0,6,40,218,1126,5726,28992,146642,741556,3749816, 18961450,95880894,484833212,2451616864, 12396892316,62686360476,316981037374, 1602852315476,8105013367472,40983964057352, 207240288658392] |