n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 16 |
4 | 65 |
5 | 263 |
6 | 1065 |
7 | 4312 |
8 | 17459 |
9 | 70690 |
10 | 286218 |
11 | 1158873 |
12 | 4692181 |
13 | 18998253 |
14 | 76922356 |
15 | 311452261 |
16 | 1261044460 |
17 | 5105864780 |
18 | 20673224441 |
19 | 83704176903 |
20 | 338911293253 |
21 | 1372223811812 |
22 | 5556020785351 |
23 | 22495868896554 |
24 | 91083913642878 |
25 | 368791237300201 |
26 | 1493205235368669 |
27 | 6045864568949689 |
28 | 24479205885623944 |
29 | 99114281168039257 |
30 | 401305531615563236 |
[0,1,4,16,65,263,1065,4312,17459,70690,286218, 1158873,4692181,18998253,76922356,311452261, 1261044460,5105864780,20673224441,83704176903, 338911293253,1372223811812,5556020785351, 22495868896554,91083913642878,368791237300201, 1493205235368669,6045864568949689, 24479205885623944,99114281168039257, 401305531615563236] |