n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 12 |
5 | 24 |
6 | 98 |
7 | 344 |
8 | 1236 |
9 | 5332 |
10 | 23772 |
11 | 110962 |
12 | 547714 |
13 | 2840028 |
14 | 15439466 |
15 | 87299850 |
16 | 512569668 |
17 | 3111575102 |
18 | 19577613014 |
19 | 127331688104 |
20 | 852129210498 |
21 | 5853657714546 |
22 | 41377621755100 |
23 | 300511333393982 |
24 | 2233952140321104 |
[0,1,2,6,12,24,98,344,1236,5332,23772,110962, 547714,2840028,15439466,87299850,512569668, 3111575102,19577613014,127331688104,852129210498, 5853657714546,41377621755100,300511333393982, 2233952140321104] |