n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 96 |
6 | 576 |
7 | 4032 |
8 | 32256 |
9 | 290304 |
10 | 2975616 |
11 | 32731776 |
12 | 392781312 |
13 | 5106157056 |
14 | 71486198784 |
15 | 1070549415936 |
16 | 17128790654976 |
17 | 291189441134592 |
18 | 5241409940422656 |
19 | 99586788868030464 |
20 | 1991897970827821056 |
21 | 41829857387384242176 |
22 | 920256862522453327872 |
[1,1,2,6,24,96,576,4032,32256,290304,2975616, 32731776,392781312,5106157056,71486198784, 1070549415936,17128790654976,291189441134592, 5241409940422656,99586788868030464, 1991897970827821056,41829857387384242176, 920256862522453327872] |