n | a(n) |
---|---|
1 | 7 |
2 | 19 |
3 | 57 |
4 | 409 |
5 | 2047 |
6 | 10747 |
7 | 70423 |
8 | 427507 |
9 | 2610075 |
10 | 16811257 |
11 | 106973797 |
12 | 685280521 |
13 | 4472908837 |
14 | 29110775719 |
15 | 191077482297 |
16 | 1268190506821 |
17 | 8394627812935 |
18 | 56013012538219 |
19 | 376887163063705 |
20 | 2528646896288971 |
[7,19,57,409,2047,10747,70423,427507,2610075, 16811257,106973797,685280521,4472908837, 29110775719,191077482297,1268190506821, 8394627812935,56013012538219,376887163063705, 2528646896288971] |