n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 24 |
7 | 144 |
8 | 312 |
9 | 1080 |
10 | 4632 |
11 | 24240 |
12 | 9264 |
13 | 57744 |
14 | 134016 |
15 | 517536 |
16 | 2338176 |
17 | 12725952 |
18 | 7014528 |
19 | 45192384 |
20 | 111428352 |
21 | 469862208 |
22 | 2213733888 |
23 | 12478256064 |
24 | 8854935552 |
25 | 58767959808 |
26 | 152955661824 |
27 | 693938824704 |
[1,1,2,6,24,120,24,144,312,1080,4632,24240,9264, 57744,134016,517536,2338176,12725952,7014528, 45192384,111428352,469862208,2213733888, 12478256064,8854935552,58767959808,152955661824, 693938824704] |