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 | 2 |
| 2 | 23 |
| 3 | 233 |
| 4 | 2333 |
| 5 | 23333 |
| 6 | 233993 |
| 7 | 2339933 |
| 8 | 23399339 |
| 9 | 1979339333 |
| 10 | 23339531339 |
| 11 | 293999994791 |
| 12 | 3733799959397 |
| 13 | 233323747999733 |
| 14 | 2333939994739931 |
| 15 | 23833939369399333 |
| 16 | 238339393693993337 |
| 17 | 23833939369399333613 |