n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 56 |
3 | 1024 |
4 | 21216 |
5 | 473088 |
6 | 11075328 |
7 | 268435456 |
8 | 6677665280 |
9 | 169514369024 |
10 | 4373549027328 |
11 | 114349209288704 |
12 | 3023068543631360 |
13 | 80675644291153920 |
14 | 2170389180446539776 |
15 | 58798996734949195776 |
16 | 1602737048880933109760 |
17 | 43924199383151211970560 |
[1,4,56,1024,21216,473088,11075328,268435456, 6677665280,169514369024,4373549027328, 114349209288704,3023068543631360, 80675644291153920,2170389180446539776, 58798996734949195776,1602737048880933109760, 43924199383151211970560] |