n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 18 |
5 | 40 |
6 | 80 |
7 | 176 |
8 | 352 |
9 | 769 |
10 | 1538 |
11 | 3343 |
12 | 6686 |
13 | 14477 |
14 | 28954 |
15 | 62505 |
16 | 125010 |
17 | 269216 |
18 | 538432 |
19 | 1157244 |
20 | 2314488 |
21 | 4966260 |
22 | 9932520 |
23 | 21282622 |
24 | 42565244 |
25 | 91096110 |
26 | 182192220 |
27 | 389515284 |
28 | 779030568 |
29 | 1664015246 |
30 | 3328030492 |
[1,2,4,9,18,40,80,176,352,769,1538,3343,6686, 14477,28954,62505,125010,269216,538432,1157244, 2314488,4966260,9932520,21282622,42565244, 91096110,182192220,389515284,779030568,1664015246, 3328030492] |