n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 18 |
4 | 125 |
5 | 1020 |
6 | 9667 |
7 | 104790 |
8 | 1281177 |
9 | 17457840 |
10 | 262493231 |
11 | 4318429962 |
12 | 77178551749 |
13 | 1489209086820 |
14 | 30859393432155 |
15 | 683549418431934 |
16 | 16118484827641841 |
17 | 403156528379483160 |
18 | 10661349675027656839 |
[0,1,3,18,125,1020,9667,104790,1281177,17457840, 262493231,4318429962,77178551749,1489209086820, 30859393432155,683549418431934,16118484827641841, 403156528379483160,10661349675027656839] |