n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 46 |
4 | 336 |
5 | 2476 |
6 | 18216 |
7 | 134056 |
8 | 986496 |
9 | 7259536 |
10 | 53422176 |
11 | 393128416 |
12 | 2892992256 |
13 | 21289237696 |
14 | 156665348736 |
15 | 1152884469376 |
16 | 8483960303616 |
17 | 62432606515456 |
18 | 459435242128896 |
19 | 3380937517927936 |
20 | 24879977528856576 |
21 | 183089240352418816 |
22 | 1347335217403078656 |
[0,1,6,46,336,2476,18216,134056,986496,7259536, 53422176,393128416,2892992256,21289237696, 156665348736,1152884469376,8483960303616, 62432606515456,459435242128896,3380937517927936, 24879977528856576,183089240352418816, 1347335217403078656] |