n | a(n) |
---|---|
0 | 1 |
1 | 84 |
2 | 2184 |
3 | 30576 |
4 | 286650 |
5 | 2018016 |
6 | 11435424 |
7 | 54609984 |
8 | 226972746 |
9 | 840639800 |
10 | 2824549728 |
11 | 8730426432 |
12 | 25099975992 |
13 | 67725379008 |
14 | 172768824000 |
15 | 419252346240 |
16 | 972796459635 |
17 | 2167754048460 |
18 | 4656656844840 |
19 | 9674494830000 |
20 | 19494107082450 |
21 | 38192536324800 |
22 | 72913023892800 |
[1,84,2184,30576,286650,2018016,11435424,54609984, 226972746,840639800,2824549728,8730426432, 25099975992,67725379008,172768824000,419252346240, 972796459635,2167754048460,4656656844840, 9674494830000,19494107082450,38192536324800, 72913023892800] |