n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 27 |
4 | 177 |
5 | 1270 |
6 | 9645 |
7 | 76206 |
8 | 619913 |
9 | 5156959 |
10 | 43667985 |
11 | 375140383 |
12 | 3261467573 |
13 | 28641957520 |
14 | 253702185717 |
15 | 2263964868768 |
16 | 20334261430769 |
17 | 183680693283325 |
18 | 1667613040080061 |
19 | 15208587941854251 |
20 | 139266058402655669 |
21 | 1279953660931370623 |
[1,1,5,27,177,1270,9645,76206,619913,5156959, 43667985,375140383,3261467573,28641957520, 253702185717,2263964868768,20334261430769, 183680693283325,1667613040080061, 15208587941854251,139266058402655669, 1279953660931370623] |