n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 75 |
4 | 371 |
5 | 1833 |
6 | 9057 |
7 | 44753 |
8 | 221137 |
9 | 1092699 |
10 | 5399327 |
11 | 26679563 |
12 | 131831075 |
13 | 651413681 |
14 | 3218814561 |
15 | 15905050017 |
16 | 78591236385 |
17 | 388340962771 |
18 | 1918899743823 |
19 | 9481812581835 |
20 | 46852249642771 |
[1,3,15,75,371,1833,9057,44753,221137,1092699, 5399327,26679563,131831075,651413681,3218814561, 15905050017,78591236385,388340962771, 1918899743823,9481812581835,46852249642771] |