n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 24 |
4 | 192 |
5 | 1800 |
6 | 20880 |
7 | 282240 |
8 | 4354560 |
9 | 75479040 |
10 | 1455148800 |
11 | 30855686400 |
12 | 713712384000 |
13 | 17884003737600 |
14 | 482619020083200 |
15 | 13954193180928000 |
16 | 430360865206272000 |
17 | 14102295149150208000 |
18 | 489295008086556672000 |
19 | 17919783031425859584000 |
[1,1,4,24,192,1800,20880,282240,4354560,75479040, 1455148800,30855686400,713712384000, 17884003737600,482619020083200,13954193180928000, 430360865206272000,14102295149150208000, 489295008086556672000,17919783031425859584000] |