n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 26 |
4 | 307 |
5 | 2571 |
6 | 42702 |
7 | 3243689 |
8 | 132728354 |
9 | 1491326272 |
10 | 101843558868 |
11 | 74672717363118 |
12 | 12952235029243936 |
13 | 334070494079203752 |
14 | 109915013016304822208 |
15 | 695394278635888843298780 |
16 | 579704015638436450676621584 |
17 | 44655320458467210977882177104 |
18 | 75051772861714827753881814035744 |
[1,4,26,307,2571,42702,3243689,132728354, 1491326272,101843558868,74672717363118, 12952235029243936,334070494079203752, 109915013016304822208,695394278635888843298780, 579704015638436450676621584, 44655320458467210977882177104, 75051772861714827753881814035744] |