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 | 7879 |
| 3 | 9091 |
| 4 | 186187 |
| 5 | 276277 |
| 6 | 426427 |
| 7 | 438439 |
| 8 | 450451 |
| 9 | 600601 |
| 10 | 606607 |
| 11 | 798799 |
| 12 | 816817 |
| 13 | 858859 |
| 14 | 936937 |
| 15 | 960961 |
| 16 | 11401141 |
| 17 | 13981399 |
| 18 | 15361537 |
| 19 | 17461747 |
| 20 | 17881789 |
| 21 | 18961897 |
| 22 | 21002101 |
| 23 | 21902191 |
| 24 | 22082209 |
| 25 | 27362737 |
| 26 | 28802881 |