n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 16 |
4 | 88 |
5 | 568 |
6 | 4288 |
7 | 36832 |
8 | 354688 |
9 | 3781504 |
10 | 44199424 |
11 | 561823744 |
12 | 7714272256 |
13 | 113769309184 |
14 | 1793341407232 |
15 | 30085661765632 |
16 | 535170830467072 |
17 | 10060645294440448 |
18 | 199287423535808512 |
19 | 4148644277780217856 |
[1,1,4,16,88,568,4288,36832,354688,3781504, 44199424,561823744,7714272256,113769309184, 1793341407232,30085661765632,535170830467072, 10060645294440448,199287423535808512, 4148644277780217856] |