n | a(n) |
---|---|
3 | 1 |
4 | 31 |
5 | 602 |
6 | 10206 |
7 | 166824 |
8 | 2739240 |
9 | 46070640 |
10 | 801496080 |
11 | 14495120640 |
12 | 273158645760 |
13 | 5368729766400 |
14 | 110055327782400 |
15 | 2351983118284800 |
16 | 52361635508582400 |
17 | 1213240925049753600 |
18 | 29227769646147072000 |
19 | 731310069474496512000 |
20 | 18984684514588176384000 |
[1,31,602,10206,166824,2739240,46070640,801496080, 14495120640,273158645760,5368729766400, 110055327782400,2351983118284800, 52361635508582400,1213240925049753600, 29227769646147072000,731310069474496512000, 18984684514588176384000] |