n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 11 |
4 | 47 |
5 | 225 |
6 | 1173 |
7 | 6529 |
8 | 38265 |
9 | 233795 |
10 | 1478265 |
11 | 9619065 |
12 | 64135965 |
13 | 436693431 |
14 | 3028075677 |
15 | 21335364345 |
16 | 152466207953 |
17 | 1103356966359 |
18 | 8075335006933 |
19 | 59706844371261 |
20 | 445545262970505 |
21 | 3352776605782479 |
22 | 25424338834654587 |
[1,1,3,11,47,225,1173,6529,38265,233795,1478265, 9619065,64135965,436693431,3028075677,21335364345, 152466207953,1103356966359,8075335006933, 59706844371261,445545262970505,3352776605782479, 25424338834654587] |