n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 18 |
3 | 206 |
4 | 3690 |
5 | 91742 |
6 | 2493738 |
7 | 63266366 |
8 | 1449722250 |
9 | 30406367582 |
10 | 595643428458 |
11 | 11087927110526 |
12 | 198731319099210 |
13 | 3462982712427422 |
14 | 59088178966503978 |
15 | 992435464713354686 |
16 | 16472174763523362570 |
17 | 270964491631927159262 |
18 | 4427273424527020664298 |
[1,2,18,206,3690,91742,2493738,63266366, 1449722250,30406367582,595643428458, 11087927110526,198731319099210,3462982712427422, 59088178966503978,992435464713354686, 16472174763523362570,270964491631927159262, 4427273424527020664298] |