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 | 67 |
| 2 | 89 |
| 3 | 7879 |
| 4 | 8081 |
| 5 | 9091 |
| 6 | 9293 |
| 7 | 186187 |
| 8 | 188189 |
| 9 | 276277 |
| 10 | 278279 |
| 11 | 426427 |
| 12 | 428429 |
| 13 | 438439 |
| 14 | 440441 |
| 15 | 450451 |
| 16 | 452453 |
| 17 | 600601 |
| 18 | 602603 |
| 19 | 606607 |
| 20 | 608609 |
| 21 | 798799 |
| 22 | 800801 |
| 23 | 816817 |
| 24 | 818819 |
| 25 | 858859 |
| 26 | 860861 |
| 27 | 936937 |
| 28 | 938939 |
| 29 | 960961 |
| 30 | 962963 |
| 31 | 11401141 |
| 32 | 11421143 |