n | a(n) |
---|---|
1 | 2 |
2 | 5 |
3 | 11 |
4 | 31 |
5 | 129 |
6 | 731 |
7 | 5053 |
8 | 40335 |
9 | 362897 |
10 | 3628819 |
11 | 39916821 |
12 | 479001623 |
13 | 6227020825 |
14 | 87178291227 |
15 | 1307674368029 |
16 | 20922789888031 |
17 | 355687428096033 |
18 | 6402373705728035 |
19 | 121645100408832037 |
20 | 2432902008176640039 |
[2,5,11,31,129,731,5053,40335,362897,3628819, 39916821,479001623,6227020825,87178291227, 1307674368029,20922789888031,355687428096033, 6402373705728035,121645100408832037, 2432902008176640039] |