n | a(n) |
---|---|
1 | 1 |
2 | 720 |
3 | 51840 |
4 | 737280 |
5 | 9360000 |
6 | 37324800 |
7 | 276595200 |
8 | 754974720 |
9 | 3061100160 |
10 | 6739200000 |
11 | 25721308800 |
12 | 38220595200 |
13 | 137037962880 |
14 | 199148544000 |
15 | 485222400000 |
16 | 773094113280 |
17 | 2008994088960 |
18 | 2203992115200 |
19 | 6114035779200 |
20 | 6900940800000 |
21 | 14338695168000 |
22 | 18519342336000 |
23 | 41348052472320 |
[1,720,51840,737280,9360000,37324800,276595200, 754974720,3061100160,6739200000,25721308800, 38220595200,137037962880,199148544000, 485222400000,773094113280,2008994088960, 2203992115200,6114035779200,6900940800000, 14338695168000,18519342336000,41348052472320] |