n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 42 |
4 | 248 |
5 | 1312 |
6 | 6528 |
7 | 31232 |
8 | 145408 |
9 | 663552 |
10 | 2981888 |
11 | 13238272 |
12 | 58195968 |
13 | 253755392 |
14 | 1098907648 |
15 | 4731174912 |
16 | 20266876928 |
17 | 86436216832 |
18 | 367219703808 |
19 | 1554778161152 |
20 | 6562710028288 |
21 | 27625229647872 |
22 | 115998476730368 |
[1,6,42,248,1312,6528,31232,145408,663552,2981888, 13238272,58195968,253755392,1098907648,4731174912, 20266876928,86436216832,367219703808, 1554778161152,6562710028288,27625229647872, 115998476730368] |