n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 19 |
3 | 71 |
4 | 271 |
5 | 1055 |
6 | 4159 |
7 | 16511 |
8 | 65791 |
9 | 262655 |
10 | 1049599 |
11 | 4196351 |
12 | 16781311 |
13 | 67117055 |
14 | 268451839 |
15 | 1073774591 |
16 | 4295032831 |
17 | 17180000255 |
18 | 68719738879 |
19 | 274878431231 |
20 | 1099512676351 |
21 | 4398048608255 |
22 | 17592190238719 |
[1,5,19,71,271,1055,4159,16511,65791,262655, 1049599,4196351,16781311,67117055,268451839, 1073774591,4295032831,17180000255,68719738879, 274878431231,1099512676351,4398048608255, 17592190238719] |