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 | 1231 |
| 2 | 1321 |
| 3 | 1381 |
| 4 | 1471 |
| 5 | 1741 |
| 6 | 1831 |
| 7 | 12491 |
| 8 | 12641 |
| 9 | 12841 |
| 10 | 13591 |
| 11 | 13751 |
| 12 | 13781 |
| 13 | 13841 |
| 14 | 14591 |
| 15 | 14621 |
| 16 | 14821 |
| 17 | 14831 |
| 18 | 14891 |
| 19 | 15731 |
| 20 | 15791 |
| 21 | 18731 |
| 22 | 19421 |
| 23 | 19531 |
| 24 | 19541 |
| 25 | 19751 |
| 26 | 19841 |
| 27 | 123731 |
| 28 | 123821 |
| 29 | 124951 |
| 30 | 124981 |
| 31 | 125641 |
| 32 | 125651 |
| 33 | 125791 |
| 34 | 125821 |
| 35 | 125941 |
| 36 | 126761 |
| 37 | 126851 |