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 | 113 |
| 2 | 199 |
| 3 | 337 |
| 4 | 1151 |
| 5 | 1181 |
| 6 | 3343 |
| 7 | 3373 |
| 8 | 7177 |
| 9 | 7577 |
| 10 | 11161 |
| 11 | 77797 |
| 12 | 98999 |
| 13 | 111119 |
| 14 | 111211 |
| 15 | 323333 |
| 16 | 333337 |
| 17 | 333433 |
| 18 | 777787 |
| 19 | 777877 |
| 20 | 991999 |
| 21 | 1111711 |
| 22 | 3333373 |
| 23 | 9929999 |
| 24 | 11111117 |
| 25 | 11111911 |
| 26 | 11113111 |