n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 48 |
5 | 167 |
6 | 593 |
7 | 2144 |
8 | 7864 |
9 | 29171 |
10 | 109173 |
11 | 411501 |
12 | 1560089 |
13 | 5943199 |
14 | 22732739 |
15 | 87253604 |
16 | 335897864 |
17 | 1296447899 |
18 | 5015206349 |
19 | 19439895089 |
20 | 75487384829 |
21 | 293595204239 |
22 | 1143532045499 |
23 | 4459774977449 |
24 | 17413705988873 |
[1,4,14,48,167,593,2144,7864,29171,109173,411501, 1560089,5943199,22732739,87253604,335897864, 1296447899,5015206349,19439895089,75487384829, 293595204239,1143532045499,4459774977449, 17413705988873] |