n | a(n) |
---|---|
1 | 4 |
2 | 9 |
3 | 26 |
4 | 71 |
5 | 180 |
6 | 433 |
7 | 1006 |
8 | 2283 |
9 | 5096 |
10 | 11237 |
11 | 24546 |
12 | 53215 |
13 | 114652 |
14 | 245721 |
15 | 524246 |
16 | 1114067 |
17 | 2359248 |
18 | 4980685 |
19 | 10485706 |
20 | 22020039 |
21 | 46137284 |
22 | 96468929 |
23 | 201326526 |
24 | 419430331 |
25 | 872415160 |
26 | 1811939253 |
27 | 3758096306 |
28 | 7784628143 |
29 | 16106127276 |
30 | 33285996457 |
[4,9,26,71,180,433,1006,2283,5096,11237,24546, 53215,114652,245721,524246,1114067,2359248, 4980685,10485706,22020039,46137284,96468929, 201326526,419430331,872415160,1811939253, 3758096306,7784628143,16106127276,33285996457] |