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 | 1100090011 |
| 2 | 1100900011 |
| 3 | 1103093011 |
| 4 | 1103903011 |
| 5 | 1154094511 |
| 6 | 1154904511 |
| 7 | 1213093121 |
| 8 | 1213903121 |
| 9 | 1304094031 |
| 10 | 1304904031 |
| 11 | 1364094631 |
| 12 | 1364904631 |
| 13 | 1367097631 |
| 14 | 1367907631 |
| 15 | 1421091241 |
| 16 | 1421901241 |
| 17 | 1450090541 |
| 18 | 1450900541 |
| 19 | 1466096641 |
| 20 | 1466906641 |
| 21 | 1495095941 |
| 22 | 1495905941 |
| 23 | 1498098941 |
| 24 | 1498908941 |