n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 36 |
5 | 151 |
6 | 750 |
7 | 3959 |
8 | 22857 |
9 | 140031 |
10 | 909388 |
11 | 6202031 |
12 | 44256875 |
13 | 328994157 |
14 | 2540242646 |
15 | 20317980102 |
16 | 167980915848 |
17 | 1432808198569 |
18 | 12587788263807 |
19 | 113739153822878 |
20 | 1055610955120803 |
21 | 10051265993496814 |
22 | 98083750658261085 |
23 | 979961276867802001 |
24 | 10015362142357613001 |
[1,1,3,9,36,151,750,3959,22857,140031,909388, 6202031,44256875,328994157,2540242646,20317980102, 167980915848,1432808198569,12587788263807, 113739153822878,1055610955120803, 10051265993496814,98083750658261085, 979961276867802001,10015362142357613001] |