n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 16 |
6 | 136 |
7 | 736 |
8 | 4096 |
9 | 20224 |
10 | 326656 |
11 | 2970496 |
12 | 33826816 |
13 | 291237376 |
14 | 2129910784 |
15 | 13607197696 |
16 | 324498374656 |
17 | 4599593353216 |
18 | 52741679343616 |
19 | 495632154179584 |
20 | 7127212838772736 |
21 | 94268828128854016 |
22 | 2098358019107700736 |
23 | 34030412427789500416 |
[1,1,1,1,4,16,136,736,4096,20224,326656,2970496, 33826816,291237376,2129910784,13607197696, 324498374656,4599593353216,52741679343616, 495632154179584,7127212838772736, 94268828128854016,2098358019107700736, 34030412427789500416] |