n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 4 |
3 | 72 |
4 | 132 |
5 | 7020 |
6 | 17280 |
7 | 1920240 |
8 | 6022800 |
9 | 1154366640 |
10 | 4421511360 |
11 | 1303028052480 |
12 | 5906331224640 |
13 | 2481613890275520 |
14 | 13003380449579520 |
15 | 7385997122881977600 |
16 | 43944212734316294400 |
17 | 32440254625217626387200 |
18 | 216088204725662645376000 |
[1,3,4,72,132,7020,17280,1920240,6022800, 1154366640,4421511360,1303028052480,5906331224640, 2481613890275520,13003380449579520, 7385997122881977600,43944212734316294400, 32440254625217626387200,216088204725662645376000] |