n | a(n) |
---|---|
1 | -1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 12 |
6 | 52 |
7 | 456 |
8 | 6873 |
9 | 191532 |
10 | 9733032 |
11 | 903753248 |
12 | 154108311046 |
13 | 48542114686912 |
14 | 28401423719121392 |
15 | 31021002160355166800 |
16 | 63530415842308265086523 |
17 | 244912778438520759443245824 |
18 | 1783398846284777975419599903948 |
19 | 24605641171260376770598003978281472 |
[-1,1,2,3,12,52,456,6873,191532,9733032,903753248, 154108311046,48542114686912,28401423719121392, 31021002160355166800,63530415842308265086523, 244912778438520759443245824, 1783398846284777975419599903948, 24605641171260376770598003978281472] |