n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 71 |
3 | 559 |
4 | 4401 |
5 | 34649 |
6 | 272791 |
7 | 2147679 |
8 | 16908641 |
9 | 133121449 |
10 | 1048062951 |
11 | 8251382159 |
12 | 64962994321 |
13 | 511452572409 |
14 | 4026657584951 |
15 | 31701808107199 |
16 | 249587807272641 |
17 | 1965000650073929 |
18 | 15470417393318791 |
19 | 121798338496476399 |
[1,9,71,559,4401,34649,272791,2147679,16908641, 133121449,1048062951,8251382159,64962994321, 511452572409,4026657584951,31701808107199, 249587807272641,1965000650073929, 15470417393318791,121798338496476399] |