n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 64 |
4 | 344 |
5 | 1848 |
6 | 9928 |
7 | 53336 |
8 | 286536 |
9 | 1539352 |
10 | 8269832 |
11 | 44427864 |
12 | 238678984 |
13 | 1282250648 |
14 | 6888611208 |
15 | 37007557336 |
16 | 198815009096 |
17 | 1068090160152 |
18 | 5738080818952 |
19 | 30826584415064 |
20 | 165609083713224 |
21 | 889698587396248 |
[1,2,12,64,344,1848,9928,53336,286536,1539352, 8269832,44427864,238678984,1282250648,6888611208, 37007557336,198815009096,1068090160152, 5738080818952,30826584415064,165609083713224, 889698587396248] |