n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 18 |
3 | 162 |
4 | 1458 |
5 | 13122 |
6 | 118098 |
7 | 1062882 |
8 | 9565938 |
9 | 86093442 |
10 | 774840978 |
11 | 6973568802 |
12 | 62762119218 |
13 | 564859072962 |
14 | 5083731656658 |
15 | 45753584909922 |
16 | 411782264189298 |
17 | 3706040377703682 |
18 | 33354363399333138 |
19 | 300189270593998242 |
20 | 2701703435345984178 |
[1,2,18,162,1458,13122,118098,1062882,9565938, 86093442,774840978,6973568802,62762119218, 564859072962,5083731656658,45753584909922, 411782264189298,3706040377703682, 33354363399333138,300189270593998242, 2701703435345984178] |