n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 720 |
7 | 10080 |
8 | 114240 |
9 | 1270080 |
10 | 14621040 |
11 | 177629760 |
12 | 2292618240 |
13 | 31485168000 |
14 | 459767275968 |
15 | 7126635035520 |
16 | 117007217832960 |
17 | 2030137891891200 |
18 | 37138576448883456 |
19 | 714734162773420032 |
20 | 14439823458634690560 |
21 | 305638240397811793920 |
22 | 6764967047810572812288 |
[0,0,0,0,0,0,720,10080,114240,1270080,14621040, 177629760,2292618240,31485168000,459767275968, 7126635035520,117007217832960,2030137891891200, 37138576448883456,714734162773420032, 14439823458634690560,305638240397811793920, 6764967047810572812288] |