n | a(n) |
---|---|
4 | 42 |
5 | 640 |
6 | 5894 |
7 | 42840 |
8 | 271240 |
9 | 1569984 |
10 | 8536890 |
11 | 44346456 |
12 | 222516030 |
13 | 1086685600 |
14 | 5193298110 |
15 | 24384586200 |
16 | 112831907760 |
17 | 515709552000 |
18 | 2332549535400 |
19 | 10455495457248 |
20 | 46500885666900 |
21 | 205401168733824 |
22 | 901819865269180 |
23 | 3938266773556720 |
24 | 17116175702216624 |
[42,640,5894,42840,271240,1569984,8536890, 44346456,222516030,1086685600,5193298110, 24384586200,112831907760,515709552000, 2332549535400,10455495457248,46500885666900, 205401168733824,901819865269180,3938266773556720, 17116175702216624] |