n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 16 |
4 | 106 |
5 | 658 |
6 | 6088 |
7 | 51952 |
8 | 592828 |
9 | 6577948 |
10 | 88213744 |
11 | 1173121024 |
12 | 18663391096 |
13 | 289030343704 |
14 | 5157010548064 |
15 | 92428084599232 |
16 | 1848308567352592 |
17 | 37038307949425168 |
18 | 822602470902709312 |
19 | 18285742807660340992 |
20 | 444405771941314880416 |
21 | 10883864256927386369056 |
22 | 286778106663948874858624 |
[1,1,4,16,106,658,6088,51952,592828,6577948, 88213744,1173121024,18663391096,289030343704, 5157010548064,92428084599232,1848308567352592, 37038307949425168,822602470902709312, 18285742807660340992,444405771941314880416, 10883864256927386369056,286778106663948874858624] |