n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 20 |
5 | 44 |
6 | 98 |
7 | 218 |
8 | 485 |
9 | 1079 |
10 | 2400 |
11 | 5339 |
12 | 11878 |
13 | 26426 |
14 | 58791 |
15 | 130795 |
16 | 290986 |
17 | 647370 |
18 | 1440233 |
19 | 3204151 |
20 | 7128419 |
21 | 15858914 |
22 | 35282038 |
23 | 78493533 |
24 | 174628085 |
25 | 388502937 |
26 | 864319917 |
27 | 1922891303 |
28 | 4277942565 |
29 | 9517330782 |
30 | 21173632847 |
[1,2,4,9,20,44,98,218,485,1079,2400,5339,11878, 26426,58791,130795,290986,647370,1440233,3204151, 7128419,15858914,35282038,78493533,174628085, 388502937,864319917,1922891303,4277942565, 9517330782,21173632847] |