This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 19 |
| 3 | 23 |
| 4 | 31 |
| 5 | 79 |
| 6 | 97 |
| 7 | 103 |
| 8 | 109 |
| 9 | 409 |
| 10 | 709 |
| 11 | 907 |
| 12 | 1009 |
| 13 | 2003 |
| 14 | 3001 |
| 15 | 9001 |
| 16 | 9007 |
| 17 | 10009 |
| 18 | 40009 |
| 19 | 70009 |
| 20 | 90001 |
| 21 | 90007 |
| 22 | 100003 |
| 23 | 200003 |
| 24 | 400009 |
| 25 | 900001 |
| 26 | 900007 |
| 27 | 1000003 |
| 28 | 2000003 |
| 29 | 7000009 |
| 30 | 20000003 |
| 31 | 30000001 |
| 32 | 400000009 |
| 33 | 1000000009 |
| 34 | 4000000009 |
| 35 | 9000000001 |