n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 64 |
4 | 253 |
5 | 1000 |
6 | 3952 |
7 | 15616 |
8 | 61705 |
9 | 243820 |
10 | 963424 |
11 | 3806848 |
12 | 15042277 |
13 | 59437648 |
14 | 234860320 |
15 | 928020736 |
16 | 3666956113 |
17 | 14489511508 |
18 | 57253465072 |
19 | 226229798080 |
20 | 893918323981 |
21 | 3532204761400 |
22 | 13957058650384 |
23 | 55149545207296 |
24 | 217916425857241 |
25 | 861069089144764 |
[1,4,16,64,253,1000,3952,15616,61705,243820, 963424,3806848,15042277,59437648,234860320, 928020736,3666956113,14489511508,57253465072, 226229798080,893918323981,3532204761400, 13957058650384,55149545207296,217916425857241, 861069089144764] |