n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 4 |
4 | 6 |
5 | 12 |
6 | 20 |
7 | 40 |
8 | 74 |
9 | 148 |
10 | 286 |
11 | 572 |
12 | 1124 |
13 | 2248 |
14 | 4460 |
15 | 8920 |
16 | 17768 |
17 | 35536 |
18 | 70930 |
19 | 141860 |
20 | 283440 |
21 | 566880 |
22 | 1133200 |
23 | 2266400 |
24 | 4531686 |
25 | 9063372 |
26 | 18124522 |
27 | 36249044 |
28 | 72493652 |
29 | 144987304 |
30 | 289965744 |
[2,2,4,6,12,20,40,74,148,286,572,1124,2248,4460, 8920,17768,35536,70930,141860,283440,566880, 1133200,2266400,4531686,9063372,18124522,36249044, 72493652,144987304,289965744] |