n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 6 |
5 | 60 |
6 | 300 |
7 | 1296 |
8 | 6048 |
9 | 30240 |
10 | 159408 |
11 | 883872 |
12 | 5018112 |
13 | 28304640 |
14 | 157697280 |
15 | 876311654 |
16 | 4895520768 |
17 | 27554100480 |
18 | 156139902720 |
19 | 889181991936 |
20 | 5078255822436 |
21 | 29046943180800 |
22 | 166354131141818 |
23 | 954240788994048 |
24 | 5484206701412352 |
25 | 31581437286776820 |
[0,0,0,6,60,300,1296,6048,30240,159408,883872, 5018112,28304640,157697280,876311654,4895520768, 27554100480,156139902720,889181991936, 5078255822436,29046943180800,166354131141818, 954240788994048,5484206701412352, 31581437286776820] |