n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 18 |
3 | 180 |
4 | 1734 |
5 | 18300 |
6 | 270420 |
7 | 5151720 |
8 | 96203910 |
9 | 1565102844 |
10 | 22108977596 |
11 | 287976684088 |
12 | 3835267955036 |
13 | 55283720348664 |
14 | 804522994149032 |
15 | 10849701753955856 |
16 | 150403977728200774 |
17 | 3086256025416536700 |
18 | 91156710989444409004 |
19 | 2687925748932854737432 |
[1,2,18,180,1734,18300,270420,5151720,96203910, 1565102844,22108977596,287976684088,3835267955036, 55283720348664,804522994149032,10849701753955856, 150403977728200774,3086256025416536700, 91156710989444409004,2687925748932854737432] |