n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 9 |
5 | 64 |
6 | 630 |
7 | 7916 |
8 | 121023 |
9 | 2179556 |
10 | 45179508 |
11 | 1059312264 |
12 | 27715541568 |
13 | 800423573676 |
14 | 25289923553700 |
15 | 867723362137464 |
16 | 32128443862364255 |
17 | 1276818947065793736 |
18 | 54208515369076658640 |
19 | 2448636361058495090816 |
20 | 117254071399557173396416 |
[1,1,2,9,64,630,7916,121023,2179556,45179508, 1059312264,27715541568,800423573676, 25289923553700,867723362137464,32128443862364255, 1276818947065793736,54208515369076658640, 2448636361058495090816,117254071399557173396416] |