n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 31 |
3 | 209 |
4 | 1471 |
5 | 10625 |
6 | 78079 |
7 | 580865 |
8 | 4361215 |
9 | 32978945 |
10 | 250806271 |
11 | 1916280833 |
12 | 14698053631 |
13 | 113104519169 |
14 | 872801042431 |
15 | 6751535300609 |
16 | 52337071357951 |
17 | 406468580343809 |
18 | 3162019821780991 |
19 | 24634626678980609 |
20 | 192179216026959871 |
[1,5,31,209,1471,10625,78079,580865,4361215, 32978945,250806271,1916280833,14698053631, 113104519169,872801042431,6751535300609, 52337071357951,406468580343809,3162019821780991, 24634626678980609,192179216026959871] |