n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 83 |
5 | 503 |
6 | 3403 |
7 | 25807 |
8 | 218451 |
9 | 2049687 |
10 | 21160667 |
11 | 238690847 |
12 | 2923054435 |
13 | 38641535143 |
14 | 548635554795 |
15 | 8328494925615 |
16 | 134634766604915 |
17 | 2309386642312631 |
18 | 41897258229334267 |
19 | 801610384425038911 |
20 | 16132033041827096451 |
[1,1,3,15,83,503,3403,25807,218451,2049687, 21160667,238690847,2923054435,38641535143, 548635554795,8328494925615,134634766604915, 2309386642312631,41897258229334267, 801610384425038911,16132033041827096451] |