n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 180 |
6 | 1440 |
7 | 9072 |
8 | 50544 |
9 | 286416 |
10 | 1658880 |
11 | 9722592 |
12 | 58335552 |
13 | 356638464 |
14 | 2179768320 |
15 | 13180786560 |
16 | 79012495872 |
17 | 472093588224 |
18 | 2821539889152 |
19 | 16894457846784 |
20 | 101356447675392 |
21 | 608733733690368 |
22 | 3656096522698752 |
23 | 21947538146863104 |
24 | 131685228881178624 |
[0,2,6,24,180,1440,9072,50544,286416,1658880, 9722592,58335552,356638464,2179768320,13180786560, 79012495872,472093588224,2821539889152, 16894457846784,101356447675392,608733733690368, 3656096522698752,21947538146863104, 131685228881178624] |