n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 6 |
4 | 36 |
5 | 240 |
6 | 2160 |
7 | 20160 |
8 | 241920 |
9 | 2903040 |
10 | 39916800 |
11 | 578793600 |
12 | 9580032000 |
13 | 161902540800 |
14 | 3007651046400 |
15 | 58845346560000 |
16 | 1234444603392000 |
17 | 26854400821248000 |
18 | 624231436308480000 |
19 | 15083992450695168000 |
20 | 385614968295997440000 |
[1,1,6,36,240,2160,20160,241920,2903040,39916800, 578793600,9580032000,161902540800,3007651046400, 58845346560000,1234444603392000,26854400821248000, 624231436308480000,15083992450695168000, 385614968295997440000] |