n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 14 |
4 | 48 |
5 | 158 |
6 | 532 |
7 | 1778 |
8 | 5952 |
9 | 19922 |
10 | 66676 |
11 | 223166 |
12 | 746928 |
13 | 2499950 |
14 | 8367268 |
15 | 28005026 |
16 | 93732096 |
17 | 313718882 |
18 | 1050008932 |
19 | 3514352558 |
20 | 11762446512 |
21 | 39368602238 |
22 | 131765686708 |
23 | 441016322834 |
24 | 1476070150464 |
25 | 4940368363442 |
[1,2,4,14,48,158,532,1778,5952,19922,66676,223166, 746928,2499950,8367268,28005026,93732096, 313718882,1050008932,3514352558,11762446512, 39368602238,131765686708,441016322834, 1476070150464,4940368363442] |