n | a(n) |
---|---|
1 | 2 |
2 | 23 |
3 | 31 |
4 | 101 |
5 | 103 |
6 | 307 |
7 | 701 |
8 | 1009 |
9 | 9001 |
10 | 10007 |
11 | 70001 |
12 | 100003 |
13 | 300007 |
14 | 700001 |
15 | 1000003 |
16 | 3000017 |
17 | 7000003 |
18 | 30000001 |
19 | 100000007 |
20 | 700000001 |
21 | 1000000007 |
22 | 7000000001 |
23 | 10000000019 |
24 | 90000000019 |
25 | 90000000023 |
26 | 300000000077 |
[2,23,31,101,103,307,701,1009,9001,10007,70001, 100003,300007,700001,1000003,3000017,7000003, 30000001,100000007,700000001,1000000007, 7000000001,10000000019,90000000019,90000000023, 300000000077] |