n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 38 |
3 | 252 |
4 | 1732 |
5 | 12216 |
6 | 87704 |
7 | 637104 |
8 | 4663312 |
9 | 34298208 |
10 | 253025888 |
11 | 1870171584 |
12 | 13839178816 |
13 | 102484311936 |
14 | 759279663488 |
15 | 5626889356032 |
16 | 41707163713792 |
17 | 309171726460416 |
18 | 2292017151256064 |
19 | 16992367115418624 |
20 | 125979822242317312 |
21 | 934017384983574528 |
22 | 6924894663564105728 |
[1,6,38,252,1732,12216,87704,637104,4663312, 34298208,253025888,1870171584,13839178816, 102484311936,759279663488,5626889356032, 41707163713792,309171726460416,2292017151256064, 16992367115418624,125979822242317312, 934017384983574528,6924894663564105728] |