n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 13 |
4 | 49 |
5 | 181 |
6 | 685 |
7 | 2605 |
8 | 9988 |
9 | 38479 |
10 | 148879 |
11 | 577930 |
12 | 2249698 |
13 | 8777614 |
14 | 34315012 |
15 | 134377393 |
16 | 526994773 |
17 | 2069403898 |
18 | 8135377102 |
19 | 32014655626 |
20 | 126099239329 |
21 | 497083313908 |
22 | 1960943833567 |
23 | 7740893831005 |
24 | 30576064032568 |
[1,1,4,13,49,181,685,2605,9988,38479,148879, 577930,2249698,8777614,34315012,134377393, 526994773,2069403898,8135377102,32014655626, 126099239329,497083313908,1960943833567, 7740893831005,30576064032568] |