n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 10 |
4 | 19 |
5 | 51 |
6 | 112 |
7 | 316 |
8 | 841 |
9 | 2378 |
10 | 6656 |
11 | 18822 |
12 | 54110 |
13 | 156081 |
14 | 456362 |
15 | 1339875 |
16 | 3954181 |
17 | 11726896 |
18 | 34900213 |
19 | 104248948 |
20 | 312357934 |
21 | 938457801 |
22 | 2826683630 |
23 | 8533327397 |
24 | 25814570672 |
25 | 78239402726 |
26 | 237542444180 |
27 | 722354138859 |
28 | 2199894223892 |
[2,4,10,19,51,112,316,841,2378,6656,18822,54110, 156081,456362,1339875,3954181,11726896,34900213, 104248948,312357934,938457801,2826683630, 8533327397,25814570672,78239402726,237542444180, 722354138859,2199894223892] |