n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 6 |
3 | 16 |
4 | 52 |
5 | 184 |
6 | 688 |
7 | 2672 |
8 | 10672 |
9 | 43552 |
10 | 180800 |
11 | 761088 |
12 | 3241088 |
13 | 13937408 |
14 | 60435968 |
15 | 263962880 |
16 | 1160188672 |
17 | 5127762432 |
18 | 22775636992 |
19 | 101608357888 |
20 | 455105255424 |
21 | 2045751037952 |
22 | 9225923895296 |
23 | 41731062358016 |
24 | 189275050729472 |
25 | 860630181167104 |
[1,3,6,16,52,184,688,2672,10672,43552,180800, 761088,3241088,13937408,60435968,263962880, 1160188672,5127762432,22775636992,101608357888, 455105255424,2045751037952,9225923895296, 41731062358016,189275050729472,860630181167104] |