n | a(n) |
---|---|
1 | 2 |
2 | 8 |
3 | 20 |
4 | 50 |
5 | 118 |
6 | 292 |
7 | 688 |
8 | 1702 |
9 | 4010 |
10 | 9920 |
11 | 23372 |
12 | 57818 |
13 | 136222 |
14 | 336988 |
15 | 793960 |
16 | 1964110 |
17 | 4627538 |
18 | 11447672 |
19 | 26971268 |
20 | 66721922 |
21 | 157200070 |
22 | 388883860 |
23 | 916229152 |
24 | 2266581238 |
25 | 5340174842 |
26 | 13210603568 |
27 | 31124819900 |
28 | 76997040170 |
29 | 181408744558 |
30 | 448771637452 |
[2,8,20,50,118,292,688,1702,4010,9920,23372,57818, 136222,336988,793960,1964110,4627538,11447672, 26971268,66721922,157200070,388883860,916229152, 2266581238,5340174842,13210603568,31124819900, 76997040170,181408744558,448771637452] |