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 | 1 |
| 2 | 81 |
| 3 | 121 |
| 4 | 8281 |
| 5 | 11881 |
| 6 | 128881 |
| 7 | 11282881 |
| 8 | 228281881 |
| 9 | 1112822881 |
| 10 | 111128222881 |
| 11 | 11111282222881 |
| 12 | 222128888112121 |
| 13 | 228828882122281 |
| 14 | 812121128112121 |
| 15 | 1111112822222881 |
| 16 | 8181222218111881 |
| 17 | 111111128222222881 |
| 18 | 11111111282222222881 |
| 19 | 1111111112822222222881 |
| 20 | 2118128181211211281281 |