n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 49 |
4 | 399 |
5 | 3521 |
6 | 32767 |
7 | 316673 |
8 | 3147775 |
9 | 31977985 |
10 | 330544639 |
11 | 3465369601 |
12 | 36759599103 |
13 | 393820102657 |
14 | 4255079743487 |
15 | 46313023946753 |
16 | 507319247208447 |
17 | 5588706552643585 |
18 | 61875364144283647 |
19 | 688128167799619585 |
20 | 7683686768042639359 |
[1,1,7,49,399,3521,32767,316673,3147775,31977985, 330544639,3465369601,36759599103,393820102657, 4255079743487,46313023946753,507319247208447, 5588706552643585,61875364144283647, 688128167799619585,7683686768042639359] |