n | a(n) |
---|---|
1 | 7 |
2 | 17 |
3 | 115 |
4 | 457 |
5 | 3055 |
6 | 16081 |
7 | 107731 |
8 | 655001 |
9 | 4427407 |
10 | 28848817 |
11 | 196901395 |
12 | 1326556777 |
13 | 9126593455 |
14 | 62528586641 |
15 | 432702173011 |
16 | 2991144099001 |
17 | 20781922758607 |
18 | 144379920476017 |
19 | 1005798678435475 |
20 | 7008103279484297 |
[7,17,115,457,3055,16081,107731,655001,4427407, 28848817,196901395,1326556777,9126593455, 62528586641,432702173011,2991144099001, 20781922758607,144379920476017,1005798678435475, 7008103279484297] |