n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 8 |
4 | 52 |
5 | 472 |
6 | 5504 |
7 | 78416 |
8 | 1320064 |
9 | 25637824 |
10 | 564275648 |
11 | 13879795712 |
12 | 377332365568 |
13 | 11234698041088 |
14 | 363581406419456 |
15 | 12707452084972544 |
16 | 477027941930515456 |
17 | 19142041172838025216 |
18 | 817675811320888020992 |
19 | 37044610820729973813248 |
20 | 1774189422608238694776832 |
[1,2,8,52,472,5504,78416,1320064,25637824, 564275648,13879795712,377332365568,11234698041088, 363581406419456,12707452084972544, 477027941930515456,19142041172838025216, 817675811320888020992,37044610820729973813248, 1774189422608238694776832] |