n | a(n) |
---|---|
0 | 2 |
1 | 7 |
2 | 37 |
3 | 217 |
4 | 1297 |
5 | 7777 |
6 | 46657 |
7 | 279937 |
8 | 1679617 |
9 | 10077697 |
10 | 60466177 |
11 | 362797057 |
12 | 2176782337 |
13 | 13060694017 |
14 | 78364164097 |
15 | 470184984577 |
16 | 2821109907457 |
17 | 16926659444737 |
18 | 101559956668417 |
19 | 609359740010497 |
20 | 3656158440062977 |
[2,7,37,217,1297,7777,46657,279937,1679617, 10077697,60466177,362797057,2176782337, 13060694017,78364164097,470184984577, 2821109907457,16926659444737,101559956668417, 609359740010497,3656158440062977] |